Coverage for /usr/lib/python3/dist-packages/scipy/constants/

1"""

2Fundamental Physical Constants

3------------------------------

5These constants are taken from CODATA Recommended Values of the Fundamental

6Physical Constants 2018.

8Object

9------

10physical_constants : dict

11 A dictionary containing physical constants. Keys are the names of physical

12 constants, values are tuples (value, units, precision).

14Functions

15---------

16value(key):

17 Returns the value of the physical constant(key).

18unit(key):

19 Returns the units of the physical constant(key).

20precision(key):

21 Returns the relative precision of the physical constant(key).

22find(sub):

23 Prints or returns list of keys containing the string sub, default is all.

25Source

26------

27The values of the constants provided at this site are recommended for

28international use by CODATA and are the latest available. Termed the "2018

29CODATA recommended values," they are generally recognized worldwide for use in

30all fields of science and technology. The values became available on 20 May

312019 and replaced the 2014 CODATA set. Also available is an introduction to the

32constants for non-experts at

34https://physics.nist.gov/cuu/Constants/introduction.html

36References

37----------

38Theoretical and experimental publications relevant to the fundamental constants

39and closely related precision measurements published since the mid 1980s, but

40also including many older papers of particular interest, some of which date

41back to the 1800s. To search the bibliography, visit

43https://physics.nist.gov/cuu/Constants/

45"""

47# Compiled by Charles Harris, dated October 3, 2002

48# updated to 2002 values by BasSw, 2006

49# Updated to 2006 values by Vincent Davis June 2010

50# Updated to 2014 values by Joseph Booker, 2015

51# Updated to 2018 values by Jakob Jakobson, 2019

53from __future__ import annotations

55import warnings

57from typing import Any

59__all__ = ['physical_constants', 'value', 'unit', 'precision', 'find',

60 'ConstantWarning']

62"""

63Source: https://physics.nist.gov/cuu/Constants/

65The values of the constants provided at this site are recommended for

66international use by CODATA and are the latest available. Termed the "2018

67CODATA recommended values," they are generally recognized worldwide for use in

68all fields of science and technology. The values became available on 20 May

692019 and replaced the 2014 CODATA set.

70"""

72#

73# Source: https://physics.nist.gov/cuu/Constants/

74#

76# Quantity Value Uncertainty Unit

77# ---------------------------------------------------- --------------------- -------------------- -------------

78txt2002 = """\

79Wien displacement law constant 2.897 7685e-3 0.000 0051e-3 m K

80atomic unit of 1st hyperpolarizablity 3.206 361 51e-53 0.000 000 28e-53 C^3 m^3 J^-2

81atomic unit of 2nd hyperpolarizablity 6.235 3808e-65 0.000 0011e-65 C^4 m^4 J^-3

82atomic unit of electric dipole moment 8.478 353 09e-30 0.000 000 73e-30 C m

83atomic unit of electric polarizablity 1.648 777 274e-41 0.000 000 016e-41 C^2 m^2 J^-1

84atomic unit of electric quadrupole moment 4.486 551 24e-40 0.000 000 39e-40 C m^2

85atomic unit of magn. dipole moment 1.854 801 90e-23 0.000 000 16e-23 J T^-1

86atomic unit of magn. flux density 2.350 517 42e5 0.000 000 20e5 T

87deuteron magn. moment 0.433 073 482e-26 0.000 000 038e-26 J T^-1

88deuteron magn. moment to Bohr magneton ratio 0.466 975 4567e-3 0.000 000 0050e-3

89deuteron magn. moment to nuclear magneton ratio 0.857 438 2329 0.000 000 0092

90deuteron-electron magn. moment ratio -4.664 345 548e-4 0.000 000 050e-4

91deuteron-proton magn. moment ratio 0.307 012 2084 0.000 000 0045

92deuteron-neutron magn. moment ratio -0.448 206 52 0.000 000 11

93electron gyromagn. ratio 1.760 859 74e11 0.000 000 15e11 s^-1 T^-1

94electron gyromagn. ratio over 2 pi 28 024.9532 0.0024 MHz T^-1

95electron magn. moment -928.476 412e-26 0.000 080e-26 J T^-1

96electron magn. moment to Bohr magneton ratio -1.001 159 652 1859 0.000 000 000 0038

97electron magn. moment to nuclear magneton ratio -1838.281 971 07 0.000 000 85

98electron magn. moment anomaly 1.159 652 1859e-3 0.000 000 0038e-3

99electron to shielded proton magn. moment ratio -658.227 5956 0.000 0071

100electron to shielded helion magn. moment ratio 864.058 255 0.000 010

101electron-deuteron magn. moment ratio -2143.923 493 0.000 023

102electron-muon magn. moment ratio 206.766 9894 0.000 0054

103electron-neutron magn. moment ratio 960.920 50 0.000 23

104electron-proton magn. moment ratio -658.210 6862 0.000 0066

105magn. constant 12.566 370 614...e-7 0 N A^-2

106magn. flux quantum 2.067 833 72e-15 0.000 000 18e-15 Wb

107muon magn. moment -4.490 447 99e-26 0.000 000 40e-26 J T^-1

108muon magn. moment to Bohr magneton ratio -4.841 970 45e-3 0.000 000 13e-3

109muon magn. moment to nuclear magneton ratio -8.890 596 98 0.000 000 23

110muon-proton magn. moment ratio -3.183 345 118 0.000 000 089

111neutron gyromagn. ratio 1.832 471 83e8 0.000 000 46e8 s^-1 T^-1

112neutron gyromagn. ratio over 2 pi 29.164 6950 0.000 0073 MHz T^-1

113neutron magn. moment -0.966 236 45e-26 0.000 000 24e-26 J T^-1

114neutron magn. moment to Bohr magneton ratio -1.041 875 63e-3 0.000 000 25e-3

115neutron magn. moment to nuclear magneton ratio -1.913 042 73 0.000 000 45

116neutron to shielded proton magn. moment ratio -0.684 996 94 0.000 000 16

117neutron-electron magn. moment ratio 1.040 668 82e-3 0.000 000 25e-3

118neutron-proton magn. moment ratio -0.684 979 34 0.000 000 16

119proton gyromagn. ratio 2.675 222 05e8 0.000 000 23e8 s^-1 T^-1

120proton gyromagn. ratio over 2 pi 42.577 4813 0.000 0037 MHz T^-1

121proton magn. moment 1.410 606 71e-26 0.000 000 12e-26 J T^-1

122proton magn. moment to Bohr magneton ratio 1.521 032 206e-3 0.000 000 015e-3

123proton magn. moment to nuclear magneton ratio 2.792 847 351 0.000 000 028

124proton magn. shielding correction 25.689e-6 0.015e-6

125proton-neutron magn. moment ratio -1.459 898 05 0.000 000 34

126shielded helion gyromagn. ratio 2.037 894 70e8 0.000 000 18e8 s^-1 T^-1

127shielded helion gyromagn. ratio over 2 pi 32.434 1015 0.000 0028 MHz T^-1

128shielded helion magn. moment -1.074 553 024e-26 0.000 000 093e-26 J T^-1

129shielded helion magn. moment to Bohr magneton ratio -1.158 671 474e-3 0.000 000 014e-3

130shielded helion magn. moment to nuclear magneton ratio -2.127 497 723 0.000 000 025

131shielded helion to proton magn. moment ratio -0.761 766 562 0.000 000 012

132shielded helion to shielded proton magn. moment ratio -0.761 786 1313 0.000 000 0033

133shielded helion gyromagn. ratio 2.037 894 70e8 0.000 000 18e8 s^-1 T^-1

134shielded helion gyromagn. ratio over 2 pi 32.434 1015 0.000 0028 MHz T^-1

135shielded proton magn. moment 1.410 570 47e-26 0.000 000 12e-26 J T^-1

136shielded proton magn. moment to Bohr magneton ratio 1.520 993 132e-3 0.000 000 016e-3

137shielded proton magn. moment to nuclear magneton ratio 2.792 775 604 0.000 000 030

138{220} lattice spacing of silicon 192.015 5965e-12 0.000 0070e-12 m"""

139

140txt2006 = """\

141lattice spacing of silicon 192.015 5762 e-12 0.000 0050 e-12 m

142alpha particle-electron mass ratio 7294.299 5365 0.000 0031

143alpha particle mass 6.644 656 20 e-27 0.000 000 33 e-27 kg

144alpha particle mass energy equivalent 5.971 919 17 e-10 0.000 000 30 e-10 J

145alpha particle mass energy equivalent in MeV 3727.379 109 0.000 093 MeV

146alpha particle mass in u 4.001 506 179 127 0.000 000 000 062 u

147alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 062 e-3 kg mol^-1

148alpha particle-proton mass ratio 3.972 599 689 51 0.000 000 000 41

149Angstrom star 1.000 014 98 e-10 0.000 000 90 e-10 m

150atomic mass constant 1.660 538 782 e-27 0.000 000 083 e-27 kg

151atomic mass constant energy equivalent 1.492 417 830 e-10 0.000 000 074 e-10 J

152atomic mass constant energy equivalent in MeV 931.494 028 0.000 023 MeV

153atomic mass unit-electron volt relationship 931.494 028 e6 0.000 023 e6 eV

154atomic mass unit-hartree relationship 3.423 177 7149 e7 0.000 000 0049 e7 E_h

155atomic mass unit-hertz relationship 2.252 342 7369 e23 0.000 000 0032 e23 Hz

156atomic mass unit-inverse meter relationship 7.513 006 671 e14 0.000 000 011 e14 m^-1

157atomic mass unit-joule relationship 1.492 417 830 e-10 0.000 000 074 e-10 J

158atomic mass unit-kelvin relationship 1.080 9527 e13 0.000 0019 e13 K

159atomic mass unit-kilogram relationship 1.660 538 782 e-27 0.000 000 083 e-27 kg

160atomic unit of 1st hyperpolarizability 3.206 361 533 e-53 0.000 000 081 e-53 C^3 m^3 J^-2

161atomic unit of 2nd hyperpolarizability 6.235 380 95 e-65 0.000 000 31 e-65 C^4 m^4 J^-3

162atomic unit of action 1.054 571 628 e-34 0.000 000 053 e-34 J s

163atomic unit of charge 1.602 176 487 e-19 0.000 000 040 e-19 C

164atomic unit of charge density 1.081 202 300 e12 0.000 000 027 e12 C m^-3

165atomic unit of current 6.623 617 63 e-3 0.000 000 17 e-3 A

166atomic unit of electric dipole mom. 8.478 352 81 e-30 0.000 000 21 e-30 C m

167atomic unit of electric field 5.142 206 32 e11 0.000 000 13 e11 V m^-1

168atomic unit of electric field gradient 9.717 361 66 e21 0.000 000 24 e21 V m^-2

169atomic unit of electric polarizability 1.648 777 2536 e-41 0.000 000 0034 e-41 C^2 m^2 J^-1

170atomic unit of electric potential 27.211 383 86 0.000 000 68 V

171atomic unit of electric quadrupole mom. 4.486 551 07 e-40 0.000 000 11 e-40 C m^2

172atomic unit of energy 4.359 743 94 e-18 0.000 000 22 e-18 J

173atomic unit of force 8.238 722 06 e-8 0.000 000 41 e-8 N

174atomic unit of length 0.529 177 208 59 e-10 0.000 000 000 36 e-10 m

175atomic unit of mag. dipole mom. 1.854 801 830 e-23 0.000 000 046 e-23 J T^-1

176atomic unit of mag. flux density 2.350 517 382 e5 0.000 000 059 e5 T

177atomic unit of magnetizability 7.891 036 433 e-29 0.000 000 027 e-29 J T^-2

178atomic unit of mass 9.109 382 15 e-31 0.000 000 45 e-31 kg

179atomic unit of momentum 1.992 851 565 e-24 0.000 000 099 e-24 kg m s^-1

180atomic unit of permittivity 1.112 650 056... e-10 (exact) F m^-1

181atomic unit of time 2.418 884 326 505 e-17 0.000 000 000 016 e-17 s

182atomic unit of velocity 2.187 691 2541 e6 0.000 000 0015 e6 m s^-1

183Avogadro constant 6.022 141 79 e23 0.000 000 30 e23 mol^-1

184Bohr magneton 927.400 915 e-26 0.000 023 e-26 J T^-1

185Bohr magneton in eV/T 5.788 381 7555 e-5 0.000 000 0079 e-5 eV T^-1

186Bohr magneton in Hz/T 13.996 246 04 e9 0.000 000 35 e9 Hz T^-1

187Bohr magneton in inverse meters per tesla 46.686 4515 0.000 0012 m^-1 T^-1

188Bohr magneton in K/T 0.671 7131 0.000 0012 K T^-1

189Bohr radius 0.529 177 208 59 e-10 0.000 000 000 36 e-10 m

190Boltzmann constant 1.380 6504 e-23 0.000 0024 e-23 J K^-1

191Boltzmann constant in eV/K 8.617 343 e-5 0.000 015 e-5 eV K^-1

192Boltzmann constant in Hz/K 2.083 6644 e10 0.000 0036 e10 Hz K^-1

193Boltzmann constant in inverse meters per kelvin 69.503 56 0.000 12 m^-1 K^-1

194characteristic impedance of vacuum 376.730 313 461... (exact) ohm

195classical electron radius 2.817 940 2894 e-15 0.000 000 0058 e-15 m

196Compton wavelength 2.426 310 2175 e-12 0.000 000 0033 e-12 m

197Compton wavelength over 2 pi 386.159 264 59 e-15 0.000 000 53 e-15 m

198conductance quantum 7.748 091 7004 e-5 0.000 000 0053 e-5 S

199conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

200conventional value of von Klitzing constant 25 812.807 (exact) ohm

201Cu x unit 1.002 076 99 e-13 0.000 000 28 e-13 m

202deuteron-electron mag. mom. ratio -4.664 345 537 e-4 0.000 000 039 e-4

203deuteron-electron mass ratio 3670.482 9654 0.000 0016

204deuteron g factor 0.857 438 2308 0.000 000 0072

205deuteron mag. mom. 0.433 073 465 e-26 0.000 000 011 e-26 J T^-1

206deuteron mag. mom. to Bohr magneton ratio 0.466 975 4556 e-3 0.000 000 0039 e-3

207deuteron mag. mom. to nuclear magneton ratio 0.857 438 2308 0.000 000 0072

208deuteron mass 3.343 583 20 e-27 0.000 000 17 e-27 kg

209deuteron mass energy equivalent 3.005 062 72 e-10 0.000 000 15 e-10 J

210deuteron mass energy equivalent in MeV 1875.612 793 0.000 047 MeV

211deuteron mass in u 2.013 553 212 724 0.000 000 000 078 u

212deuteron molar mass 2.013 553 212 724 e-3 0.000 000 000 078 e-3 kg mol^-1

213deuteron-neutron mag. mom. ratio -0.448 206 52 0.000 000 11

214deuteron-proton mag. mom. ratio 0.307 012 2070 0.000 000 0024

215deuteron-proton mass ratio 1.999 007 501 08 0.000 000 000 22

216deuteron rms charge radius 2.1402 e-15 0.0028 e-15 m

217electric constant 8.854 187 817... e-12 (exact) F m^-1

218electron charge to mass quotient -1.758 820 150 e11 0.000 000 044 e11 C kg^-1

219electron-deuteron mag. mom. ratio -2143.923 498 0.000 018

220electron-deuteron mass ratio 2.724 437 1093 e-4 0.000 000 0012 e-4

221electron g factor -2.002 319 304 3622 0.000 000 000 0015

222electron gyromag. ratio 1.760 859 770 e11 0.000 000 044 e11 s^-1 T^-1

223electron gyromag. ratio over 2 pi 28 024.953 64 0.000 70 MHz T^-1

224electron mag. mom. -928.476 377 e-26 0.000 023 e-26 J T^-1

225electron mag. mom. anomaly 1.159 652 181 11 e-3 0.000 000 000 74 e-3

226electron mag. mom. to Bohr magneton ratio -1.001 159 652 181 11 0.000 000 000 000 74

227electron mag. mom. to nuclear magneton ratio -1838.281 970 92 0.000 000 80

228electron mass 9.109 382 15 e-31 0.000 000 45 e-31 kg

229electron mass energy equivalent 8.187 104 38 e-14 0.000 000 41 e-14 J

230electron mass energy equivalent in MeV 0.510 998 910 0.000 000 013 MeV

231electron mass in u 5.485 799 0943 e-4 0.000 000 0023 e-4 u

232electron molar mass 5.485 799 0943 e-7 0.000 000 0023 e-7 kg mol^-1

233electron-muon mag. mom. ratio 206.766 9877 0.000 0052

234electron-muon mass ratio 4.836 331 71 e-3 0.000 000 12 e-3

235electron-neutron mag. mom. ratio 960.920 50 0.000 23

236electron-neutron mass ratio 5.438 673 4459 e-4 0.000 000 0033 e-4

237electron-proton mag. mom. ratio -658.210 6848 0.000 0054

238electron-proton mass ratio 5.446 170 2177 e-4 0.000 000 0024 e-4

239electron-tau mass ratio 2.875 64 e-4 0.000 47 e-4

240electron to alpha particle mass ratio 1.370 933 555 70 e-4 0.000 000 000 58 e-4

241electron to shielded helion mag. mom. ratio 864.058 257 0.000 010

242electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072

243electron volt 1.602 176 487 e-19 0.000 000 040 e-19 J

244electron volt-atomic mass unit relationship 1.073 544 188 e-9 0.000 000 027 e-9 u

245electron volt-hartree relationship 3.674 932 540 e-2 0.000 000 092 e-2 E_h

246electron volt-hertz relationship 2.417 989 454 e14 0.000 000 060 e14 Hz

247electron volt-inverse meter relationship 8.065 544 65 e5 0.000 000 20 e5 m^-1

248electron volt-joule relationship 1.602 176 487 e-19 0.000 000 040 e-19 J

249electron volt-kelvin relationship 1.160 4505 e4 0.000 0020 e4 K

250electron volt-kilogram relationship 1.782 661 758 e-36 0.000 000 044 e-36 kg

251elementary charge 1.602 176 487 e-19 0.000 000 040 e-19 C

252elementary charge over h 2.417 989 454 e14 0.000 000 060 e14 A J^-1

253Faraday constant 96 485.3399 0.0024 C mol^-1

254Faraday constant for conventional electric current 96 485.3401 0.0048 C_90 mol^-1

255Fermi coupling constant 1.166 37 e-5 0.000 01 e-5 GeV^-2

256fine-structure constant 7.297 352 5376 e-3 0.000 000 0050 e-3

257first radiation constant 3.741 771 18 e-16 0.000 000 19 e-16 W m^2

258first radiation constant for spectral radiance 1.191 042 759 e-16 0.000 000 059 e-16 W m^2 sr^-1

259hartree-atomic mass unit relationship 2.921 262 2986 e-8 0.000 000 0042 e-8 u

260hartree-electron volt relationship 27.211 383 86 0.000 000 68 eV

261Hartree energy 4.359 743 94 e-18 0.000 000 22 e-18 J

262Hartree energy in eV 27.211 383 86 0.000 000 68 eV

263hartree-hertz relationship 6.579 683 920 722 e15 0.000 000 000 044 e15 Hz

264hartree-inverse meter relationship 2.194 746 313 705 e7 0.000 000 000 015 e7 m^-1

265hartree-joule relationship 4.359 743 94 e-18 0.000 000 22 e-18 J

266hartree-kelvin relationship 3.157 7465 e5 0.000 0055 e5 K

267hartree-kilogram relationship 4.850 869 34 e-35 0.000 000 24 e-35 kg

268helion-electron mass ratio 5495.885 2765 0.000 0052

269helion mass 5.006 411 92 e-27 0.000 000 25 e-27 kg

270helion mass energy equivalent 4.499 538 64 e-10 0.000 000 22 e-10 J

271helion mass energy equivalent in MeV 2808.391 383 0.000 070 MeV

272helion mass in u 3.014 932 2473 0.000 000 0026 u

273helion molar mass 3.014 932 2473 e-3 0.000 000 0026 e-3 kg mol^-1

274helion-proton mass ratio 2.993 152 6713 0.000 000 0026

275hertz-atomic mass unit relationship 4.439 821 6294 e-24 0.000 000 0064 e-24 u

276hertz-electron volt relationship 4.135 667 33 e-15 0.000 000 10 e-15 eV

277hertz-hartree relationship 1.519 829 846 006 e-16 0.000 000 000010e-16 E_h

278hertz-inverse meter relationship 3.335 640 951... e-9 (exact) m^-1

279hertz-joule relationship 6.626 068 96 e-34 0.000 000 33 e-34 J

280hertz-kelvin relationship 4.799 2374 e-11 0.000 0084 e-11 K

281hertz-kilogram relationship 7.372 496 00 e-51 0.000 000 37 e-51 kg

282inverse fine-structure constant 137.035 999 679 0.000 000 094

283inverse meter-atomic mass unit relationship 1.331 025 0394 e-15 0.000 000 0019 e-15 u

284inverse meter-electron volt relationship 1.239 841 875 e-6 0.000 000 031 e-6 eV

285inverse meter-hartree relationship 4.556 335 252 760 e-8 0.000 000 000 030 e-8 E_h

286inverse meter-hertz relationship 299 792 458 (exact) Hz

287inverse meter-joule relationship 1.986 445 501 e-25 0.000 000 099 e-25 J

288inverse meter-kelvin relationship 1.438 7752 e-2 0.000 0025 e-2 K

289inverse meter-kilogram relationship 2.210 218 70 e-42 0.000 000 11 e-42 kg

290inverse of conductance quantum 12 906.403 7787 0.000 0088 ohm

291Josephson constant 483 597.891 e9 0.012 e9 Hz V^-1

292joule-atomic mass unit relationship 6.700 536 41 e9 0.000 000 33 e9 u

293joule-electron volt relationship 6.241 509 65 e18 0.000 000 16 e18 eV

294joule-hartree relationship 2.293 712 69 e17 0.000 000 11 e17 E_h

295joule-hertz relationship 1.509 190 450 e33 0.000 000 075 e33 Hz

296joule-inverse meter relationship 5.034 117 47 e24 0.000 000 25 e24 m^-1

297joule-kelvin relationship 7.242 963 e22 0.000 013 e22 K

298joule-kilogram relationship 1.112 650 056... e-17 (exact) kg

299kelvin-atomic mass unit relationship 9.251 098 e-14 0.000 016 e-14 u

300kelvin-electron volt relationship 8.617 343 e-5 0.000 015 e-5 eV

301kelvin-hartree relationship 3.166 8153 e-6 0.000 0055 e-6 E_h

302kelvin-hertz relationship 2.083 6644 e10 0.000 0036 e10 Hz

303kelvin-inverse meter relationship 69.503 56 0.000 12 m^-1

304kelvin-joule relationship 1.380 6504 e-23 0.000 0024 e-23 J

305kelvin-kilogram relationship 1.536 1807 e-40 0.000 0027 e-40 kg

306kilogram-atomic mass unit relationship 6.022 141 79 e26 0.000 000 30 e26 u

307kilogram-electron volt relationship 5.609 589 12 e35 0.000 000 14 e35 eV

308kilogram-hartree relationship 2.061 486 16 e34 0.000 000 10 e34 E_h

309kilogram-hertz relationship 1.356 392 733 e50 0.000 000 068 e50 Hz

310kilogram-inverse meter relationship 4.524 439 15 e41 0.000 000 23 e41 m^-1

311kilogram-joule relationship 8.987 551 787... e16 (exact) J

312kilogram-kelvin relationship 6.509 651 e39 0.000 011 e39 K

313lattice parameter of silicon 543.102 064 e-12 0.000 014 e-12 m

314Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7774 e25 0.000 0047 e25 m^-3

315mag. constant 12.566 370 614... e-7 (exact) N A^-2

316mag. flux quantum 2.067 833 667 e-15 0.000 000 052 e-15 Wb

317molar gas constant 8.314 472 0.000 015 J mol^-1 K^-1

318molar mass constant 1 e-3 (exact) kg mol^-1

319molar mass of carbon-12 12 e-3 (exact) kg mol^-1

320molar Planck constant 3.990 312 6821 e-10 0.000 000 0057 e-10 J s mol^-1

321molar Planck constant times c 0.119 626 564 72 0.000 000 000 17 J m mol^-1

322molar volume of ideal gas (273.15 K, 100 kPa) 22.710 981 e-3 0.000 040 e-3 m^3 mol^-1

323molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 996 e-3 0.000 039 e-3 m^3 mol^-1

324molar volume of silicon 12.058 8349 e-6 0.000 0011 e-6 m^3 mol^-1

325Mo x unit 1.002 099 55 e-13 0.000 000 53 e-13 m

326muon Compton wavelength 11.734 441 04 e-15 0.000 000 30 e-15 m

327muon Compton wavelength over 2 pi 1.867 594 295 e-15 0.000 000 047 e-15 m

328muon-electron mass ratio 206.768 2823 0.000 0052

329muon g factor -2.002 331 8414 0.000 000 0012

330muon mag. mom. -4.490 447 86 e-26 0.000 000 16 e-26 J T^-1

331muon mag. mom. anomaly 1.165 920 69 e-3 0.000 000 60 e-3

332muon mag. mom. to Bohr magneton ratio -4.841 970 49 e-3 0.000 000 12 e-3

333muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 23

334muon mass 1.883 531 30 e-28 0.000 000 11 e-28 kg

335muon mass energy equivalent 1.692 833 510 e-11 0.000 000 095 e-11 J

336muon mass energy equivalent in MeV 105.658 3668 0.000 0038 MeV

337muon mass in u 0.113 428 9256 0.000 000 0029 u

338muon molar mass 0.113 428 9256 e-3 0.000 000 0029 e-3 kg mol^-1

339muon-neutron mass ratio 0.112 454 5167 0.000 000 0029

340muon-proton mag. mom. ratio -3.183 345 137 0.000 000 085

341muon-proton mass ratio 0.112 609 5261 0.000 000 0029

342muon-tau mass ratio 5.945 92 e-2 0.000 97 e-2

343natural unit of action 1.054 571 628 e-34 0.000 000 053 e-34 J s

344natural unit of action in eV s 6.582 118 99 e-16 0.000 000 16 e-16 eV s

345natural unit of energy 8.187 104 38 e-14 0.000 000 41 e-14 J

346natural unit of energy in MeV 0.510 998 910 0.000 000 013 MeV

347natural unit of length 386.159 264 59 e-15 0.000 000 53 e-15 m

348natural unit of mass 9.109 382 15 e-31 0.000 000 45 e-31 kg

349natural unit of momentum 2.730 924 06 e-22 0.000 000 14 e-22 kg m s^-1

350natural unit of momentum in MeV/c 0.510 998 910 0.000 000 013 MeV/c

351natural unit of time 1.288 088 6570 e-21 0.000 000 0018 e-21 s

352natural unit of velocity 299 792 458 (exact) m s^-1

353neutron Compton wavelength 1.319 590 8951 e-15 0.000 000 0020 e-15 m

354neutron Compton wavelength over 2 pi 0.210 019 413 82 e-15 0.000 000 000 31 e-15 m

355neutron-electron mag. mom. ratio 1.040 668 82 e-3 0.000 000 25 e-3

356neutron-electron mass ratio 1838.683 6605 0.000 0011

357neutron g factor -3.826 085 45 0.000 000 90

358neutron gyromag. ratio 1.832 471 85 e8 0.000 000 43 e8 s^-1 T^-1

359neutron gyromag. ratio over 2 pi 29.164 6954 0.000 0069 MHz T^-1

360neutron mag. mom. -0.966 236 41 e-26 0.000 000 23 e-26 J T^-1

361neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3

362neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45

363neutron mass 1.674 927 211 e-27 0.000 000 084 e-27 kg

364neutron mass energy equivalent 1.505 349 505 e-10 0.000 000 075 e-10 J

365neutron mass energy equivalent in MeV 939.565 346 0.000 023 MeV

366neutron mass in u 1.008 664 915 97 0.000 000 000 43 u

367neutron molar mass 1.008 664 915 97 e-3 0.000 000 000 43 e-3 kg mol^-1

368neutron-muon mass ratio 8.892 484 09 0.000 000 23

369neutron-proton mag. mom. ratio -0.684 979 34 0.000 000 16

370neutron-proton mass ratio 1.001 378 419 18 0.000 000 000 46

371neutron-tau mass ratio 0.528 740 0.000 086

372neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16

373Newtonian constant of gravitation 6.674 28 e-11 0.000 67 e-11 m^3 kg^-1 s^-2

374Newtonian constant of gravitation over h-bar c 6.708 81 e-39 0.000 67 e-39 (GeV/c^2)^-2

375nuclear magneton 5.050 783 24 e-27 0.000 000 13 e-27 J T^-1

376nuclear magneton in eV/T 3.152 451 2326 e-8 0.000 000 0045 e-8 eV T^-1

377nuclear magneton in inverse meters per tesla 2.542 623 616 e-2 0.000 000 064 e-2 m^-1 T^-1

378nuclear magneton in K/T 3.658 2637 e-4 0.000 0064 e-4 K T^-1

379nuclear magneton in MHz/T 7.622 593 84 0.000 000 19 MHz T^-1

380Planck constant 6.626 068 96 e-34 0.000 000 33 e-34 J s

381Planck constant in eV s 4.135 667 33 e-15 0.000 000 10 e-15 eV s

382Planck constant over 2 pi 1.054 571 628 e-34 0.000 000 053 e-34 J s

383Planck constant over 2 pi in eV s 6.582 118 99 e-16 0.000 000 16 e-16 eV s

384Planck constant over 2 pi times c in MeV fm 197.326 9631 0.000 0049 MeV fm

385Planck length 1.616 252 e-35 0.000 081 e-35 m

386Planck mass 2.176 44 e-8 0.000 11 e-8 kg

387Planck mass energy equivalent in GeV 1.220 892 e19 0.000 061 e19 GeV

388Planck temperature 1.416 785 e32 0.000 071 e32 K

389Planck time 5.391 24 e-44 0.000 27 e-44 s

390proton charge to mass quotient 9.578 833 92 e7 0.000 000 24 e7 C kg^-1

391proton Compton wavelength 1.321 409 8446 e-15 0.000 000 0019 e-15 m

392proton Compton wavelength over 2 pi 0.210 308 908 61 e-15 0.000 000 000 30 e-15 m

393proton-electron mass ratio 1836.152 672 47 0.000 000 80

394proton g factor 5.585 694 713 0.000 000 046

395proton gyromag. ratio 2.675 222 099 e8 0.000 000 070 e8 s^-1 T^-1

396proton gyromag. ratio over 2 pi 42.577 4821 0.000 0011 MHz T^-1

397proton mag. mom. 1.410 606 662 e-26 0.000 000 037 e-26 J T^-1

398proton mag. mom. to Bohr magneton ratio 1.521 032 209 e-3 0.000 000 012 e-3

399proton mag. mom. to nuclear magneton ratio 2.792 847 356 0.000 000 023

400proton mag. shielding correction 25.694 e-6 0.014 e-6

401proton mass 1.672 621 637 e-27 0.000 000 083 e-27 kg

402proton mass energy equivalent 1.503 277 359 e-10 0.000 000 075 e-10 J

403proton mass energy equivalent in MeV 938.272 013 0.000 023 MeV

404proton mass in u 1.007 276 466 77 0.000 000 000 10 u

405proton molar mass 1.007 276 466 77 e-3 0.000 000 000 10 e-3 kg mol^-1

406proton-muon mass ratio 8.880 243 39 0.000 000 23

407proton-neutron mag. mom. ratio -1.459 898 06 0.000 000 34

408proton-neutron mass ratio 0.998 623 478 24 0.000 000 000 46

409proton rms charge radius 0.8768 e-15 0.0069 e-15 m

410proton-tau mass ratio 0.528 012 0.000 086

411quantum of circulation 3.636 947 5199 e-4 0.000 000 0050 e-4 m^2 s^-1

412quantum of circulation times 2 7.273 895 040 e-4 0.000 000 010 e-4 m^2 s^-1

413Rydberg constant 10 973 731.568 527 0.000 073 m^-1

414Rydberg constant times c in Hz 3.289 841 960 361 e15 0.000 000 000 022 e15 Hz

415Rydberg constant times hc in eV 13.605 691 93 0.000 000 34 eV

416Rydberg constant times hc in J 2.179 871 97 e-18 0.000 000 11 e-18 J

417Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7047 0.000 0044

418Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8677 0.000 0044

419second radiation constant 1.438 7752 e-2 0.000 0025 e-2 m K

420shielded helion gyromag. ratio 2.037 894 730 e8 0.000 000 056 e8 s^-1 T^-1

421shielded helion gyromag. ratio over 2 pi 32.434 101 98 0.000 000 90 MHz T^-1

422shielded helion mag. mom. -1.074 552 982 e-26 0.000 000 030 e-26 J T^-1

423shielded helion mag. mom. to Bohr magneton ratio -1.158 671 471 e-3 0.000 000 014 e-3

424shielded helion mag. mom. to nuclear magneton ratio -2.127 497 718 0.000 000 025

425shielded helion to proton mag. mom. ratio -0.761 766 558 0.000 000 011

426shielded helion to shielded proton mag. mom. ratio -0.761 786 1313 0.000 000 0033

427shielded proton gyromag. ratio 2.675 153 362 e8 0.000 000 073 e8 s^-1 T^-1

428shielded proton gyromag. ratio over 2 pi 42.576 3881 0.000 0012 MHz T^-1

429shielded proton mag. mom. 1.410 570 419 e-26 0.000 000 038 e-26 J T^-1

430shielded proton mag. mom. to Bohr magneton ratio 1.520 993 128 e-3 0.000 000 017 e-3

431shielded proton mag. mom. to nuclear magneton ratio 2.792 775 598 0.000 000 030

432speed of light in vacuum 299 792 458 (exact) m s^-1

433standard acceleration of gravity 9.806 65 (exact) m s^-2

434standard atmosphere 101 325 (exact) Pa

435Stefan-Boltzmann constant 5.670 400 e-8 0.000 040 e-8 W m^-2 K^-4

436tau Compton wavelength 0.697 72 e-15 0.000 11 e-15 m

437tau Compton wavelength over 2 pi 0.111 046 e-15 0.000 018 e-15 m

438tau-electron mass ratio 3477.48 0.57

439tau mass 3.167 77 e-27 0.000 52 e-27 kg

440tau mass energy equivalent 2.847 05 e-10 0.000 46 e-10 J

441tau mass energy equivalent in MeV 1776.99 0.29 MeV

442tau mass in u 1.907 68 0.000 31 u

443tau molar mass 1.907 68 e-3 0.000 31 e-3 kg mol^-1

444tau-muon mass ratio 16.8183 0.0027

445tau-neutron mass ratio 1.891 29 0.000 31

446tau-proton mass ratio 1.893 90 0.000 31

447Thomson cross section 0.665 245 8558 e-28 0.000 000 0027 e-28 m^2

448triton-electron mag. mom. ratio -1.620 514 423 e-3 0.000 000 021 e-3

449triton-electron mass ratio 5496.921 5269 0.000 0051

450triton g factor 5.957 924 896 0.000 000 076

451triton mag. mom. 1.504 609 361 e-26 0.000 000 042 e-26 J T^-1

452triton mag. mom. to Bohr magneton ratio 1.622 393 657 e-3 0.000 000 021 e-3

453triton mag. mom. to nuclear magneton ratio 2.978 962 448 0.000 000 038

454triton mass 5.007 355 88 e-27 0.000 000 25 e-27 kg

455triton mass energy equivalent 4.500 387 03 e-10 0.000 000 22 e-10 J

456triton mass energy equivalent in MeV 2808.920 906 0.000 070 MeV

457triton mass in u 3.015 500 7134 0.000 000 0025 u

458triton molar mass 3.015 500 7134 e-3 0.000 000 0025 e-3 kg mol^-1

459triton-neutron mag. mom. ratio -1.557 185 53 0.000 000 37

460triton-proton mag. mom. ratio 1.066 639 908 0.000 000 010

461triton-proton mass ratio 2.993 717 0309 0.000 000 0025

462unified atomic mass unit 1.660 538 782 e-27 0.000 000 083 e-27 kg

463von Klitzing constant 25 812.807 557 0.000 018 ohm

464weak mixing angle 0.222 55 0.000 56

465Wien frequency displacement law constant 5.878 933 e10 0.000 010 e10 Hz K^-1

466Wien wavelength displacement law constant 2.897 7685 e-3 0.000 0051 e-3 m K"""

467

468txt2010 = """\

469{220} lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

470alpha particle-electron mass ratio 7294.299 5361 0.000 0029

471alpha particle mass 6.644 656 75 e-27 0.000 000 29 e-27 kg

472alpha particle mass energy equivalent 5.971 919 67 e-10 0.000 000 26 e-10 J

473alpha particle mass energy equivalent in MeV 3727.379 240 0.000 082 MeV

474alpha particle mass in u 4.001 506 179 125 0.000 000 000 062 u

475alpha particle molar mass 4.001 506 179 125 e-3 0.000 000 000 062 e-3 kg mol^-1

476alpha particle-proton mass ratio 3.972 599 689 33 0.000 000 000 36

477Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

478atomic mass constant 1.660 538 921 e-27 0.000 000 073 e-27 kg

479atomic mass constant energy equivalent 1.492 417 954 e-10 0.000 000 066 e-10 J

480atomic mass constant energy equivalent in MeV 931.494 061 0.000 021 MeV

481atomic mass unit-electron volt relationship 931.494 061 e6 0.000 021 e6 eV

482atomic mass unit-hartree relationship 3.423 177 6845 e7 0.000 000 0024 e7 E_h

483atomic mass unit-hertz relationship 2.252 342 7168 e23 0.000 000 0016 e23 Hz

484atomic mass unit-inverse meter relationship 7.513 006 6042 e14 0.000 000 0053 e14 m^-1

485atomic mass unit-joule relationship 1.492 417 954 e-10 0.000 000 066 e-10 J

486atomic mass unit-kelvin relationship 1.080 954 08 e13 0.000 000 98 e13 K

487atomic mass unit-kilogram relationship 1.660 538 921 e-27 0.000 000 073 e-27 kg

488atomic unit of 1st hyperpolarizability 3.206 361 449 e-53 0.000 000 071 e-53 C^3 m^3 J^-2

489atomic unit of 2nd hyperpolarizability 6.235 380 54 e-65 0.000 000 28 e-65 C^4 m^4 J^-3

490atomic unit of action 1.054 571 726 e-34 0.000 000 047 e-34 J s

491atomic unit of charge 1.602 176 565 e-19 0.000 000 035 e-19 C

492atomic unit of charge density 1.081 202 338 e12 0.000 000 024 e12 C m^-3

493atomic unit of current 6.623 617 95 e-3 0.000 000 15 e-3 A

494atomic unit of electric dipole mom. 8.478 353 26 e-30 0.000 000 19 e-30 C m

495atomic unit of electric field 5.142 206 52 e11 0.000 000 11 e11 V m^-1

496atomic unit of electric field gradient 9.717 362 00 e21 0.000 000 21 e21 V m^-2

497atomic unit of electric polarizability 1.648 777 2754 e-41 0.000 000 0016 e-41 C^2 m^2 J^-1

498atomic unit of electric potential 27.211 385 05 0.000 000 60 V

499atomic unit of electric quadrupole mom. 4.486 551 331 e-40 0.000 000 099 e-40 C m^2

500atomic unit of energy 4.359 744 34 e-18 0.000 000 19 e-18 J

501atomic unit of force 8.238 722 78 e-8 0.000 000 36 e-8 N

502atomic unit of length 0.529 177 210 92 e-10 0.000 000 000 17 e-10 m

503atomic unit of mag. dipole mom. 1.854 801 936 e-23 0.000 000 041 e-23 J T^-1

504atomic unit of mag. flux density 2.350 517 464 e5 0.000 000 052 e5 T

505atomic unit of magnetizability 7.891 036 607 e-29 0.000 000 013 e-29 J T^-2

506atomic unit of mass 9.109 382 91 e-31 0.000 000 40 e-31 kg

507atomic unit of mom.um 1.992 851 740 e-24 0.000 000 088 e-24 kg m s^-1

508atomic unit of permittivity 1.112 650 056... e-10 (exact) F m^-1

509atomic unit of time 2.418 884 326 502e-17 0.000 000 000 012e-17 s

510atomic unit of velocity 2.187 691 263 79 e6 0.000 000 000 71 e6 m s^-1

511Avogadro constant 6.022 141 29 e23 0.000 000 27 e23 mol^-1

512Bohr magneton 927.400 968 e-26 0.000 020 e-26 J T^-1

513Bohr magneton in eV/T 5.788 381 8066 e-5 0.000 000 0038 e-5 eV T^-1

514Bohr magneton in Hz/T 13.996 245 55 e9 0.000 000 31 e9 Hz T^-1

515Bohr magneton in inverse meters per tesla 46.686 4498 0.000 0010 m^-1 T^-1

516Bohr magneton in K/T 0.671 713 88 0.000 000 61 K T^-1

517Bohr radius 0.529 177 210 92 e-10 0.000 000 000 17 e-10 m

518Boltzmann constant 1.380 6488 e-23 0.000 0013 e-23 J K^-1

519Boltzmann constant in eV/K 8.617 3324 e-5 0.000 0078 e-5 eV K^-1

520Boltzmann constant in Hz/K 2.083 6618 e10 0.000 0019 e10 Hz K^-1

521Boltzmann constant in inverse meters per kelvin 69.503 476 0.000 063 m^-1 K^-1

522characteristic impedance of vacuum 376.730 313 461... (exact) ohm

523classical electron radius 2.817 940 3267 e-15 0.000 000 0027 e-15 m

524Compton wavelength 2.426 310 2389 e-12 0.000 000 0016 e-12 m

525Compton wavelength over 2 pi 386.159 268 00 e-15 0.000 000 25 e-15 m

526conductance quantum 7.748 091 7346 e-5 0.000 000 0025 e-5 S

527conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

528conventional value of von Klitzing constant 25 812.807 (exact) ohm

529Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

530deuteron-electron mag. mom. ratio -4.664 345 537 e-4 0.000 000 039 e-4

531deuteron-electron mass ratio 3670.482 9652 0.000 0015

532deuteron g factor 0.857 438 2308 0.000 000 0072

533deuteron mag. mom. 0.433 073 489 e-26 0.000 000 010 e-26 J T^-1

534deuteron mag. mom. to Bohr magneton ratio 0.466 975 4556 e-3 0.000 000 0039 e-3

535deuteron mag. mom. to nuclear magneton ratio 0.857 438 2308 0.000 000 0072

536deuteron mass 3.343 583 48 e-27 0.000 000 15 e-27 kg

537deuteron mass energy equivalent 3.005 062 97 e-10 0.000 000 13 e-10 J

538deuteron mass energy equivalent in MeV 1875.612 859 0.000 041 MeV

539deuteron mass in u 2.013 553 212 712 0.000 000 000 077 u

540deuteron molar mass 2.013 553 212 712 e-3 0.000 000 000 077 e-3 kg mol^-1

541deuteron-neutron mag. mom. ratio -0.448 206 52 0.000 000 11

542deuteron-proton mag. mom. ratio 0.307 012 2070 0.000 000 0024

543deuteron-proton mass ratio 1.999 007 500 97 0.000 000 000 18

544deuteron rms charge radius 2.1424 e-15 0.0021 e-15 m

545electric constant 8.854 187 817... e-12 (exact) F m^-1

546electron charge to mass quotient -1.758 820 088 e11 0.000 000 039 e11 C kg^-1

547electron-deuteron mag. mom. ratio -2143.923 498 0.000 018

548electron-deuteron mass ratio 2.724 437 1095 e-4 0.000 000 0011 e-4

549electron g factor -2.002 319 304 361 53 0.000 000 000 000 53

550electron gyromag. ratio 1.760 859 708 e11 0.000 000 039 e11 s^-1 T^-1

551electron gyromag. ratio over 2 pi 28 024.952 66 0.000 62 MHz T^-1

552electron-helion mass ratio 1.819 543 0761 e-4 0.000 000 0017 e-4

553electron mag. mom. -928.476 430 e-26 0.000 021 e-26 J T^-1

554electron mag. mom. anomaly 1.159 652 180 76 e-3 0.000 000 000 27 e-3

555electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 76 0.000 000 000 000 27

556electron mag. mom. to nuclear magneton ratio -1838.281 970 90 0.000 000 75

557electron mass 9.109 382 91 e-31 0.000 000 40 e-31 kg

558electron mass energy equivalent 8.187 105 06 e-14 0.000 000 36 e-14 J

559electron mass energy equivalent in MeV 0.510 998 928 0.000 000 011 MeV

560electron mass in u 5.485 799 0946 e-4 0.000 000 0022 e-4 u

561electron molar mass 5.485 799 0946 e-7 0.000 000 0022 e-7 kg mol^-1

562electron-muon mag. mom. ratio 206.766 9896 0.000 0052

563electron-muon mass ratio 4.836 331 66 e-3 0.000 000 12 e-3

564electron-neutron mag. mom. ratio 960.920 50 0.000 23

565electron-neutron mass ratio 5.438 673 4461 e-4 0.000 000 0032 e-4

566electron-proton mag. mom. ratio -658.210 6848 0.000 0054

567electron-proton mass ratio 5.446 170 2178 e-4 0.000 000 0022 e-4

568electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4

569electron to alpha particle mass ratio 1.370 933 555 78 e-4 0.000 000 000 55 e-4

570electron to shielded helion mag. mom. ratio 864.058 257 0.000 010

571electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072

572electron-triton mass ratio 1.819 200 0653 e-4 0.000 000 0017 e-4

573electron volt 1.602 176 565 e-19 0.000 000 035 e-19 J

574electron volt-atomic mass unit relationship 1.073 544 150 e-9 0.000 000 024 e-9 u

575electron volt-hartree relationship 3.674 932 379 e-2 0.000 000 081 e-2 E_h

576electron volt-hertz relationship 2.417 989 348 e14 0.000 000 053 e14 Hz

577electron volt-inverse meter relationship 8.065 544 29 e5 0.000 000 18 e5 m^-1

578electron volt-joule relationship 1.602 176 565 e-19 0.000 000 035 e-19 J

579electron volt-kelvin relationship 1.160 4519 e4 0.000 0011 e4 K

580electron volt-kilogram relationship 1.782 661 845 e-36 0.000 000 039 e-36 kg

581elementary charge 1.602 176 565 e-19 0.000 000 035 e-19 C

582elementary charge over h 2.417 989 348 e14 0.000 000 053 e14 A J^-1

583Faraday constant 96 485.3365 0.0021 C mol^-1

584Faraday constant for conventional electric current 96 485.3321 0.0043 C_90 mol^-1

585Fermi coupling constant 1.166 364 e-5 0.000 005 e-5 GeV^-2

586fine-structure constant 7.297 352 5698 e-3 0.000 000 0024 e-3

587first radiation constant 3.741 771 53 e-16 0.000 000 17 e-16 W m^2

588first radiation constant for spectral radiance 1.191 042 869 e-16 0.000 000 053 e-16 W m^2 sr^-1

589hartree-atomic mass unit relationship 2.921 262 3246 e-8 0.000 000 0021 e-8 u

590hartree-electron volt relationship 27.211 385 05 0.000 000 60 eV

591Hartree energy 4.359 744 34 e-18 0.000 000 19 e-18 J

592Hartree energy in eV 27.211 385 05 0.000 000 60 eV

593hartree-hertz relationship 6.579 683 920 729 e15 0.000 000 000 033 e15 Hz

594hartree-inverse meter relationship 2.194 746 313 708 e7 0.000 000 000 011 e7 m^-1

595hartree-joule relationship 4.359 744 34 e-18 0.000 000 19 e-18 J

596hartree-kelvin relationship 3.157 7504 e5 0.000 0029 e5 K

597hartree-kilogram relationship 4.850 869 79 e-35 0.000 000 21 e-35 kg

598helion-electron mass ratio 5495.885 2754 0.000 0050

599helion g factor -4.255 250 613 0.000 000 050

600helion mag. mom. -1.074 617 486 e-26 0.000 000 027 e-26 J T^-1

601helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3

602helion mag. mom. to nuclear magneton ratio -2.127 625 306 0.000 000 025

603helion mass 5.006 412 34 e-27 0.000 000 22 e-27 kg

604helion mass energy equivalent 4.499 539 02 e-10 0.000 000 20 e-10 J

605helion mass energy equivalent in MeV 2808.391 482 0.000 062 MeV

606helion mass in u 3.014 932 2468 0.000 000 0025 u

607helion molar mass 3.014 932 2468 e-3 0.000 000 0025 e-3 kg mol^-1

608helion-proton mass ratio 2.993 152 6707 0.000 000 0025

609hertz-atomic mass unit relationship 4.439 821 6689 e-24 0.000 000 0031 e-24 u

610hertz-electron volt relationship 4.135 667 516 e-15 0.000 000 091 e-15 eV

611hertz-hartree relationship 1.519 829 8460045e-16 0.000 000 0000076e-16 E_h

612hertz-inverse meter relationship 3.335 640 951... e-9 (exact) m^-1

613hertz-joule relationship 6.626 069 57 e-34 0.000 000 29 e-34 J

614hertz-kelvin relationship 4.799 2434 e-11 0.000 0044 e-11 K

615hertz-kilogram relationship 7.372 496 68 e-51 0.000 000 33 e-51 kg

616inverse fine-structure constant 137.035 999 074 0.000 000 044

617inverse meter-atomic mass unit relationship 1.331 025 051 20 e-15 0.000 000 000 94 e-15 u

618inverse meter-electron volt relationship 1.239 841 930 e-6 0.000 000 027 e-6 eV

619inverse meter-hartree relationship 4.556 335 252 755 e-8 0.000 000 000 023 e-8 E_h

620inverse meter-hertz relationship 299 792 458 (exact) Hz

621inverse meter-joule relationship 1.986 445 684 e-25 0.000 000 088 e-25 J

622inverse meter-kelvin relationship 1.438 7770 e-2 0.000 0013 e-2 K

623inverse meter-kilogram relationship 2.210 218 902 e-42 0.000 000 098 e-42 kg

624inverse of conductance quantum 12 906.403 7217 0.000 0042 ohm

625Josephson constant 483 597.870 e9 0.011 e9 Hz V^-1

626joule-atomic mass unit relationship 6.700 535 85 e9 0.000 000 30 e9 u

627joule-electron volt relationship 6.241 509 34 e18 0.000 000 14 e18 eV

628joule-hartree relationship 2.293 712 48 e17 0.000 000 10 e17 E_h

629joule-hertz relationship 1.509 190 311 e33 0.000 000 067 e33 Hz

630joule-inverse meter relationship 5.034 117 01 e24 0.000 000 22 e24 m^-1

631joule-kelvin relationship 7.242 9716 e22 0.000 0066 e22 K

632joule-kilogram relationship 1.112 650 056... e-17 (exact) kg

633kelvin-atomic mass unit relationship 9.251 0868 e-14 0.000 0084 e-14 u

634kelvin-electron volt relationship 8.617 3324 e-5 0.000 0078 e-5 eV

635kelvin-hartree relationship 3.166 8114 e-6 0.000 0029 e-6 E_h

636kelvin-hertz relationship 2.083 6618 e10 0.000 0019 e10 Hz

637kelvin-inverse meter relationship 69.503 476 0.000 063 m^-1

638kelvin-joule relationship 1.380 6488 e-23 0.000 0013 e-23 J

639kelvin-kilogram relationship 1.536 1790 e-40 0.000 0014 e-40 kg

640kilogram-atomic mass unit relationship 6.022 141 29 e26 0.000 000 27 e26 u

641kilogram-electron volt relationship 5.609 588 85 e35 0.000 000 12 e35 eV

642kilogram-hartree relationship 2.061 485 968 e34 0.000 000 091 e34 E_h

643kilogram-hertz relationship 1.356 392 608 e50 0.000 000 060 e50 Hz

644kilogram-inverse meter relationship 4.524 438 73 e41 0.000 000 20 e41 m^-1

645kilogram-joule relationship 8.987 551 787... e16 (exact) J

646kilogram-kelvin relationship 6.509 6582 e39 0.000 0059 e39 K

647lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

648Loschmidt constant (273.15 K, 100 kPa) 2.651 6462 e25 0.000 0024 e25 m^-3

649Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7805 e25 0.000 0024 e25 m^-3

650mag. constant 12.566 370 614... e-7 (exact) N A^-2

651mag. flux quantum 2.067 833 758 e-15 0.000 000 046 e-15 Wb

652molar gas constant 8.314 4621 0.000 0075 J mol^-1 K^-1

653molar mass constant 1 e-3 (exact) kg mol^-1

654molar mass of carbon-12 12 e-3 (exact) kg mol^-1

655molar Planck constant 3.990 312 7176 e-10 0.000 000 0028 e-10 J s mol^-1

656molar Planck constant times c 0.119 626 565 779 0.000 000 000 084 J m mol^-1

657molar volume of ideal gas (273.15 K, 100 kPa) 22.710 953 e-3 0.000 021 e-3 m^3 mol^-1

658molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 968 e-3 0.000 020 e-3 m^3 mol^-1

659molar volume of silicon 12.058 833 01 e-6 0.000 000 80 e-6 m^3 mol^-1

660Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

661muon Compton wavelength 11.734 441 03 e-15 0.000 000 30 e-15 m

662muon Compton wavelength over 2 pi 1.867 594 294 e-15 0.000 000 047 e-15 m

663muon-electron mass ratio 206.768 2843 0.000 0052

664muon g factor -2.002 331 8418 0.000 000 0013

665muon mag. mom. -4.490 448 07 e-26 0.000 000 15 e-26 J T^-1

666muon mag. mom. anomaly 1.165 920 91 e-3 0.000 000 63 e-3

667muon mag. mom. to Bohr magneton ratio -4.841 970 44 e-3 0.000 000 12 e-3

668muon mag. mom. to nuclear magneton ratio -8.890 596 97 0.000 000 22

669muon mass 1.883 531 475 e-28 0.000 000 096 e-28 kg

670muon mass energy equivalent 1.692 833 667 e-11 0.000 000 086 e-11 J

671muon mass energy equivalent in MeV 105.658 3715 0.000 0035 MeV

672muon mass in u 0.113 428 9267 0.000 000 0029 u

673muon molar mass 0.113 428 9267 e-3 0.000 000 0029 e-3 kg mol^-1

674muon-neutron mass ratio 0.112 454 5177 0.000 000 0028

675muon-proton mag. mom. ratio -3.183 345 107 0.000 000 084

676muon-proton mass ratio 0.112 609 5272 0.000 000 0028

677muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2

678natural unit of action 1.054 571 726 e-34 0.000 000 047 e-34 J s

679natural unit of action in eV s 6.582 119 28 e-16 0.000 000 15 e-16 eV s

680natural unit of energy 8.187 105 06 e-14 0.000 000 36 e-14 J

681natural unit of energy in MeV 0.510 998 928 0.000 000 011 MeV

682natural unit of length 386.159 268 00 e-15 0.000 000 25 e-15 m

683natural unit of mass 9.109 382 91 e-31 0.000 000 40 e-31 kg

684natural unit of mom.um 2.730 924 29 e-22 0.000 000 12 e-22 kg m s^-1

685natural unit of mom.um in MeV/c 0.510 998 928 0.000 000 011 MeV/c

686natural unit of time 1.288 088 668 33 e-21 0.000 000 000 83 e-21 s

687natural unit of velocity 299 792 458 (exact) m s^-1

688neutron Compton wavelength 1.319 590 9068 e-15 0.000 000 0011 e-15 m

689neutron Compton wavelength over 2 pi 0.210 019 415 68 e-15 0.000 000 000 17 e-15 m

690neutron-electron mag. mom. ratio 1.040 668 82 e-3 0.000 000 25 e-3

691neutron-electron mass ratio 1838.683 6605 0.000 0011

692neutron g factor -3.826 085 45 0.000 000 90

693neutron gyromag. ratio 1.832 471 79 e8 0.000 000 43 e8 s^-1 T^-1

694neutron gyromag. ratio over 2 pi 29.164 6943 0.000 0069 MHz T^-1

695neutron mag. mom. -0.966 236 47 e-26 0.000 000 23 e-26 J T^-1

696neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3

697neutron mag. mom. to nuclear magneton ratio -1.913 042 72 0.000 000 45

698neutron mass 1.674 927 351 e-27 0.000 000 074 e-27 kg

699neutron mass energy equivalent 1.505 349 631 e-10 0.000 000 066 e-10 J

700neutron mass energy equivalent in MeV 939.565 379 0.000 021 MeV

701neutron mass in u 1.008 664 916 00 0.000 000 000 43 u

702neutron molar mass 1.008 664 916 00 e-3 0.000 000 000 43 e-3 kg mol^-1

703neutron-muon mass ratio 8.892 484 00 0.000 000 22

704neutron-proton mag. mom. ratio -0.684 979 34 0.000 000 16

705neutron-proton mass difference 2.305 573 92 e-30 0.000 000 76 e-30

706neutron-proton mass difference energy equivalent 2.072 146 50 e-13 0.000 000 68 e-13

707neutron-proton mass difference energy equivalent in MeV 1.293 332 17 0.000 000 42

708neutron-proton mass difference in u 0.001 388 449 19 0.000 000 000 45

709neutron-proton mass ratio 1.001 378 419 17 0.000 000 000 45

710neutron-tau mass ratio 0.528 790 0.000 048

711neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16

712Newtonian constant of gravitation 6.673 84 e-11 0.000 80 e-11 m^3 kg^-1 s^-2

713Newtonian constant of gravitation over h-bar c 6.708 37 e-39 0.000 80 e-39 (GeV/c^2)^-2

714nuclear magneton 5.050 783 53 e-27 0.000 000 11 e-27 J T^-1

715nuclear magneton in eV/T 3.152 451 2605 e-8 0.000 000 0022 e-8 eV T^-1

716nuclear magneton in inverse meters per tesla 2.542 623 527 e-2 0.000 000 056 e-2 m^-1 T^-1

717nuclear magneton in K/T 3.658 2682 e-4 0.000 0033 e-4 K T^-1

718nuclear magneton in MHz/T 7.622 593 57 0.000 000 17 MHz T^-1

719Planck constant 6.626 069 57 e-34 0.000 000 29 e-34 J s

720Planck constant in eV s 4.135 667 516 e-15 0.000 000 091 e-15 eV s

721Planck constant over 2 pi 1.054 571 726 e-34 0.000 000 047 e-34 J s

722Planck constant over 2 pi in eV s 6.582 119 28 e-16 0.000 000 15 e-16 eV s

723Planck constant over 2 pi times c in MeV fm 197.326 9718 0.000 0044 MeV fm

724Planck length 1.616 199 e-35 0.000 097 e-35 m

725Planck mass 2.176 51 e-8 0.000 13 e-8 kg

726Planck mass energy equivalent in GeV 1.220 932 e19 0.000 073 e19 GeV

727Planck temperature 1.416 833 e32 0.000 085 e32 K

728Planck time 5.391 06 e-44 0.000 32 e-44 s

729proton charge to mass quotient 9.578 833 58 e7 0.000 000 21 e7 C kg^-1

730proton Compton wavelength 1.321 409 856 23 e-15 0.000 000 000 94 e-15 m

731proton Compton wavelength over 2 pi 0.210 308 910 47 e-15 0.000 000 000 15 e-15 m

732proton-electron mass ratio 1836.152 672 45 0.000 000 75

733proton g factor 5.585 694 713 0.000 000 046

734proton gyromag. ratio 2.675 222 005 e8 0.000 000 063 e8 s^-1 T^-1

735proton gyromag. ratio over 2 pi 42.577 4806 0.000 0010 MHz T^-1

736proton mag. mom. 1.410 606 743 e-26 0.000 000 033 e-26 J T^-1

737proton mag. mom. to Bohr magneton ratio 1.521 032 210 e-3 0.000 000 012 e-3

738proton mag. mom. to nuclear magneton ratio 2.792 847 356 0.000 000 023

739proton mag. shielding correction 25.694 e-6 0.014 e-6

740proton mass 1.672 621 777 e-27 0.000 000 074 e-27 kg

741proton mass energy equivalent 1.503 277 484 e-10 0.000 000 066 e-10 J

742proton mass energy equivalent in MeV 938.272 046 0.000 021 MeV

743proton mass in u 1.007 276 466 812 0.000 000 000 090 u

744proton molar mass 1.007 276 466 812 e-3 0.000 000 000 090 e-3 kg mol^-1

745proton-muon mass ratio 8.880 243 31 0.000 000 22

746proton-neutron mag. mom. ratio -1.459 898 06 0.000 000 34

747proton-neutron mass ratio 0.998 623 478 26 0.000 000 000 45

748proton rms charge radius 0.8775 e-15 0.0051 e-15 m

749proton-tau mass ratio 0.528 063 0.000 048

750quantum of circulation 3.636 947 5520 e-4 0.000 000 0024 e-4 m^2 s^-1

751quantum of circulation times 2 7.273 895 1040 e-4 0.000 000 0047 e-4 m^2 s^-1

752Rydberg constant 10 973 731.568 539 0.000 055 m^-1

753Rydberg constant times c in Hz 3.289 841 960 364 e15 0.000 000 000 017 e15 Hz

754Rydberg constant times hc in eV 13.605 692 53 0.000 000 30 eV

755Rydberg constant times hc in J 2.179 872 171 e-18 0.000 000 096 e-18 J

756Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7078 0.000 0023

757Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8708 0.000 0023

758second radiation constant 1.438 7770 e-2 0.000 0013 e-2 m K

759shielded helion gyromag. ratio 2.037 894 659 e8 0.000 000 051 e8 s^-1 T^-1

760shielded helion gyromag. ratio over 2 pi 32.434 100 84 0.000 000 81 MHz T^-1

761shielded helion mag. mom. -1.074 553 044 e-26 0.000 000 027 e-26 J T^-1

762shielded helion mag. mom. to Bohr magneton ratio -1.158 671 471 e-3 0.000 000 014 e-3

763shielded helion mag. mom. to nuclear magneton ratio -2.127 497 718 0.000 000 025

764shielded helion to proton mag. mom. ratio -0.761 766 558 0.000 000 011

765shielded helion to shielded proton mag. mom. ratio -0.761 786 1313 0.000 000 0033

766shielded proton gyromag. ratio 2.675 153 268 e8 0.000 000 066 e8 s^-1 T^-1

767shielded proton gyromag. ratio over 2 pi 42.576 3866 0.000 0010 MHz T^-1

768shielded proton mag. mom. 1.410 570 499 e-26 0.000 000 035 e-26 J T^-1

769shielded proton mag. mom. to Bohr magneton ratio 1.520 993 128 e-3 0.000 000 017 e-3

770shielded proton mag. mom. to nuclear magneton ratio 2.792 775 598 0.000 000 030

771speed of light in vacuum 299 792 458 (exact) m s^-1

772standard acceleration of gravity 9.806 65 (exact) m s^-2

773standard atmosphere 101 325 (exact) Pa

774standard-state pressure 100 000 (exact) Pa

775Stefan-Boltzmann constant 5.670 373 e-8 0.000 021 e-8 W m^-2 K^-4

776tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

777tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

778tau-electron mass ratio 3477.15 0.31

779tau mass 3.167 47 e-27 0.000 29 e-27 kg

780tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

781tau mass energy equivalent in MeV 1776.82 0.16 MeV

782tau mass in u 1.907 49 0.000 17 u

783tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

784tau-muon mass ratio 16.8167 0.0015

785tau-neutron mass ratio 1.891 11 0.000 17

786tau-proton mass ratio 1.893 72 0.000 17

787Thomson cross section 0.665 245 8734 e-28 0.000 000 0013 e-28 m^2

788triton-electron mass ratio 5496.921 5267 0.000 0050

789triton g factor 5.957 924 896 0.000 000 076

790triton mag. mom. 1.504 609 447 e-26 0.000 000 038 e-26 J T^-1

791triton mag. mom. to Bohr magneton ratio 1.622 393 657 e-3 0.000 000 021 e-3

792triton mag. mom. to nuclear magneton ratio 2.978 962 448 0.000 000 038

793triton mass 5.007 356 30 e-27 0.000 000 22 e-27 kg

794triton mass energy equivalent 4.500 387 41 e-10 0.000 000 20 e-10 J

795triton mass energy equivalent in MeV 2808.921 005 0.000 062 MeV

796triton mass in u 3.015 500 7134 0.000 000 0025 u

797triton molar mass 3.015 500 7134 e-3 0.000 000 0025 e-3 kg mol^-1

798triton-proton mass ratio 2.993 717 0308 0.000 000 0025

799unified atomic mass unit 1.660 538 921 e-27 0.000 000 073 e-27 kg

800von Klitzing constant 25 812.807 4434 0.000 0084 ohm

801weak mixing angle 0.2223 0.0021

802Wien frequency displacement law constant 5.878 9254 e10 0.000 0053 e10 Hz K^-1

803Wien wavelength displacement law constant 2.897 7721 e-3 0.000 0026 e-3 m K"""

804

805txt2014 = """\

806{220} lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

807alpha particle-electron mass ratio 7294.299 541 36 0.000 000 24

808alpha particle mass 6.644 657 230 e-27 0.000 000 082 e-27 kg

809alpha particle mass energy equivalent 5.971 920 097 e-10 0.000 000 073 e-10 J

810alpha particle mass energy equivalent in MeV 3727.379 378 0.000 023 MeV

811alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

812alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1

813alpha particle-proton mass ratio 3.972 599 689 07 0.000 000 000 36

814Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

815atomic mass constant 1.660 539 040 e-27 0.000 000 020 e-27 kg

816atomic mass constant energy equivalent 1.492 418 062 e-10 0.000 000 018 e-10 J

817atomic mass constant energy equivalent in MeV 931.494 0954 0.000 0057 MeV

818atomic mass unit-electron volt relationship 931.494 0954 e6 0.000 0057 e6 eV

819atomic mass unit-hartree relationship 3.423 177 6902 e7 0.000 000 0016 e7 E_h

820atomic mass unit-hertz relationship 2.252 342 7206 e23 0.000 000 0010 e23 Hz

821atomic mass unit-inverse meter relationship 7.513 006 6166 e14 0.000 000 0034 e14 m^-1

822atomic mass unit-joule relationship 1.492 418 062 e-10 0.000 000 018 e-10 J

823atomic mass unit-kelvin relationship 1.080 954 38 e13 0.000 000 62 e13 K

824atomic mass unit-kilogram relationship 1.660 539 040 e-27 0.000 000 020 e-27 kg

825atomic unit of 1st hyperpolarizability 3.206 361 329 e-53 0.000 000 020 e-53 C^3 m^3 J^-2

826atomic unit of 2nd hyperpolarizability 6.235 380 085 e-65 0.000 000 077 e-65 C^4 m^4 J^-3

827atomic unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

828atomic unit of charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

829atomic unit of charge density 1.081 202 3770 e12 0.000 000 0067 e12 C m^-3

830atomic unit of current 6.623 618 183 e-3 0.000 000 041 e-3 A

831atomic unit of electric dipole mom. 8.478 353 552 e-30 0.000 000 052 e-30 C m

832atomic unit of electric field 5.142 206 707 e11 0.000 000 032 e11 V m^-1

833atomic unit of electric field gradient 9.717 362 356 e21 0.000 000 060 e21 V m^-2

834atomic unit of electric polarizability 1.648 777 2731 e-41 0.000 000 0011 e-41 C^2 m^2 J^-1

835atomic unit of electric potential 27.211 386 02 0.000 000 17 V

836atomic unit of electric quadrupole mom. 4.486 551 484 e-40 0.000 000 028 e-40 C m^2

837atomic unit of energy 4.359 744 650 e-18 0.000 000 054 e-18 J

838atomic unit of force 8.238 723 36 e-8 0.000 000 10 e-8 N

839atomic unit of length 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

840atomic unit of mag. dipole mom. 1.854 801 999 e-23 0.000 000 011 e-23 J T^-1

841atomic unit of mag. flux density 2.350 517 550 e5 0.000 000 014 e5 T

842atomic unit of magnetizability 7.891 036 5886 e-29 0.000 000 0090 e-29 J T^-2

843atomic unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

844atomic unit of mom.um 1.992 851 882 e-24 0.000 000 024 e-24 kg m s^-1

845atomic unit of permittivity 1.112 650 056... e-10 (exact) F m^-1

846atomic unit of time 2.418 884 326509e-17 0.000 000 000014e-17 s

847atomic unit of velocity 2.187 691 262 77 e6 0.000 000 000 50 e6 m s^-1

848Avogadro constant 6.022 140 857 e23 0.000 000 074 e23 mol^-1

849Bohr magneton 927.400 9994 e-26 0.000 0057 e-26 J T^-1

850Bohr magneton in eV/T 5.788 381 8012 e-5 0.000 000 0026 e-5 eV T^-1

851Bohr magneton in Hz/T 13.996 245 042 e9 0.000 000 086 e9 Hz T^-1

852Bohr magneton in inverse meters per tesla 46.686 448 14 0.000 000 29 m^-1 T^-1

853Bohr magneton in K/T 0.671 714 05 0.000 000 39 K T^-1

854Bohr radius 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

855Boltzmann constant 1.380 648 52 e-23 0.000 000 79 e-23 J K^-1

856Boltzmann constant in eV/K 8.617 3303 e-5 0.000 0050 e-5 eV K^-1

857Boltzmann constant in Hz/K 2.083 6612 e10 0.000 0012 e10 Hz K^-1

858Boltzmann constant in inverse meters per kelvin 69.503 457 0.000 040 m^-1 K^-1

859characteristic impedance of vacuum 376.730 313 461... (exact) ohm

860classical electron radius 2.817 940 3227 e-15 0.000 000 0019 e-15 m

861Compton wavelength 2.426 310 2367 e-12 0.000 000 0011 e-12 m

862Compton wavelength over 2 pi 386.159 267 64 e-15 0.000 000 18 e-15 m

863conductance quantum 7.748 091 7310 e-5 0.000 000 0018 e-5 S

864conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

865conventional value of von Klitzing constant 25 812.807 (exact) ohm

866Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

867deuteron-electron mag. mom. ratio -4.664 345 535 e-4 0.000 000 026 e-4

868deuteron-electron mass ratio 3670.482 967 85 0.000 000 13

869deuteron g factor 0.857 438 2311 0.000 000 0048

870deuteron mag. mom. 0.433 073 5040 e-26 0.000 000 0036 e-26 J T^-1

871deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 0.000 000 0026 e-3

872deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 0.000 000 0048

873deuteron mass 3.343 583 719 e-27 0.000 000 041 e-27 kg

874deuteron mass energy equivalent 3.005 063 183 e-10 0.000 000 037 e-10 J

875deuteron mass energy equivalent in MeV 1875.612 928 0.000 012 MeV

876deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

877deuteron molar mass 2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1

878deuteron-neutron mag. mom. ratio -0.448 206 52 0.000 000 11

879deuteron-proton mag. mom. ratio 0.307 012 2077 0.000 000 0015

880deuteron-proton mass ratio 1.999 007 500 87 0.000 000 000 19

881deuteron rms charge radius 2.1413 e-15 0.0025 e-15 m

882electric constant 8.854 187 817... e-12 (exact) F m^-1

883electron charge to mass quotient -1.758 820 024 e11 0.000 000 011 e11 C kg^-1

884electron-deuteron mag. mom. ratio -2143.923 499 0.000 012

885electron-deuteron mass ratio 2.724 437 107 484 e-4 0.000 000 000 096 e-4

886electron g factor -2.002 319 304 361 82 0.000 000 000 000 52

887electron gyromag. ratio 1.760 859 644 e11 0.000 000 011 e11 s^-1 T^-1

888electron gyromag. ratio over 2 pi 28 024.951 64 0.000 17 MHz T^-1

889electron-helion mass ratio 1.819 543 074 854 e-4 0.000 000 000 088 e-4

890electron mag. mom. -928.476 4620 e-26 0.000 0057 e-26 J T^-1

891electron mag. mom. anomaly 1.159 652 180 91 e-3 0.000 000 000 26 e-3

892electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 0.000 000 000 000 26

893electron mag. mom. to nuclear magneton ratio -1838.281 972 34 0.000 000 17

894electron mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

895electron mass energy equivalent 8.187 105 65 e-14 0.000 000 10 e-14 J

896electron mass energy equivalent in MeV 0.510 998 9461 0.000 000 0031 MeV

897electron mass in u 5.485 799 090 70 e-4 0.000 000 000 16 e-4 u

898electron molar mass 5.485 799 090 70 e-7 0.000 000 000 16 e-7 kg mol^-1

899electron-muon mag. mom. ratio 206.766 9880 0.000 0046

900electron-muon mass ratio 4.836 331 70 e-3 0.000 000 11 e-3

901electron-neutron mag. mom. ratio 960.920 50 0.000 23

902electron-neutron mass ratio 5.438 673 4428 e-4 0.000 000 0027 e-4

903electron-proton mag. mom. ratio -658.210 6866 0.000 0020

904electron-proton mass ratio 5.446 170 213 52 e-4 0.000 000 000 52 e-4

905electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4

906electron to alpha particle mass ratio 1.370 933 554 798 e-4 0.000 000 000 045 e-4

907electron to shielded helion mag. mom. ratio 864.058 257 0.000 010

908electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072

909electron-triton mass ratio 1.819 200 062 203 e-4 0.000 000 000 084 e-4

910electron volt 1.602 176 6208 e-19 0.000 000 0098 e-19 J

911electron volt-atomic mass unit relationship 1.073 544 1105 e-9 0.000 000 0066 e-9 u

912electron volt-hartree relationship 3.674 932 248 e-2 0.000 000 023 e-2 E_h

913electron volt-hertz relationship 2.417 989 262 e14 0.000 000 015 e14 Hz

914electron volt-inverse meter relationship 8.065 544 005 e5 0.000 000 050 e5 m^-1

915electron volt-joule relationship 1.602 176 6208 e-19 0.000 000 0098 e-19 J

916electron volt-kelvin relationship 1.160 452 21 e4 0.000 000 67 e4 K

917electron volt-kilogram relationship 1.782 661 907 e-36 0.000 000 011 e-36 kg

918elementary charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

919elementary charge over h 2.417 989 262 e14 0.000 000 015 e14 A J^-1

920Faraday constant 96 485.332 89 0.000 59 C mol^-1

921Faraday constant for conventional electric current 96 485.3251 0.0012 C_90 mol^-1

922Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

923fine-structure constant 7.297 352 5664 e-3 0.000 000 0017 e-3

924first radiation constant 3.741 771 790 e-16 0.000 000 046 e-16 W m^2

925first radiation constant for spectral radiance 1.191 042 953 e-16 0.000 000 015 e-16 W m^2 sr^-1

926hartree-atomic mass unit relationship 2.921 262 3197 e-8 0.000 000 0013 e-8 u

927hartree-electron volt relationship 27.211 386 02 0.000 000 17 eV

928Hartree energy 4.359 744 650 e-18 0.000 000 054 e-18 J

929Hartree energy in eV 27.211 386 02 0.000 000 17 eV

930hartree-hertz relationship 6.579 683 920 711 e15 0.000 000 000 039 e15 Hz

931hartree-inverse meter relationship 2.194 746 313 702 e7 0.000 000 000 013 e7 m^-1

932hartree-joule relationship 4.359 744 650 e-18 0.000 000 054 e-18 J

933hartree-kelvin relationship 3.157 7513 e5 0.000 0018 e5 K

934hartree-kilogram relationship 4.850 870 129 e-35 0.000 000 060 e-35 kg

935helion-electron mass ratio 5495.885 279 22 0.000 000 27

936helion g factor -4.255 250 616 0.000 000 050

937helion mag. mom. -1.074 617 522 e-26 0.000 000 014 e-26 J T^-1

938helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3

939helion mag. mom. to nuclear magneton ratio -2.127 625 308 0.000 000 025

940helion mass 5.006 412 700 e-27 0.000 000 062 e-27 kg

941helion mass energy equivalent 4.499 539 341 e-10 0.000 000 055 e-10 J

942helion mass energy equivalent in MeV 2808.391 586 0.000 017 MeV

943helion mass in u 3.014 932 246 73 0.000 000 000 12 u

944helion molar mass 3.014 932 246 73 e-3 0.000 000 000 12 e-3 kg mol^-1

945helion-proton mass ratio 2.993 152 670 46 0.000 000 000 29

946hertz-atomic mass unit relationship 4.439 821 6616 e-24 0.000 000 0020 e-24 u

947hertz-electron volt relationship 4.135 667 662 e-15 0.000 000 025 e-15 eV

948hertz-hartree relationship 1.5198298460088 e-16 0.0000000000090e-16 E_h

949hertz-inverse meter relationship 3.335 640 951... e-9 (exact) m^-1

950hertz-joule relationship 6.626 070 040 e-34 0.000 000 081 e-34 J

951hertz-kelvin relationship 4.799 2447 e-11 0.000 0028 e-11 K

952hertz-kilogram relationship 7.372 497 201 e-51 0.000 000 091 e-51 kg

953inverse fine-structure constant 137.035 999 139 0.000 000 031

954inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 0.000 000 000 61 e-15 u

955inverse meter-electron volt relationship 1.239 841 9739 e-6 0.000 000 0076 e-6 eV

956inverse meter-hartree relationship 4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h

957inverse meter-hertz relationship 299 792 458 (exact) Hz

958inverse meter-joule relationship 1.986 445 824 e-25 0.000 000 024 e-25 J

959inverse meter-kelvin relationship 1.438 777 36 e-2 0.000 000 83 e-2 K

960inverse meter-kilogram relationship 2.210 219 057 e-42 0.000 000 027 e-42 kg

961inverse of conductance quantum 12 906.403 7278 0.000 0029 ohm

962Josephson constant 483 597.8525 e9 0.0030 e9 Hz V^-1

963joule-atomic mass unit relationship 6.700 535 363 e9 0.000 000 082 e9 u

964joule-electron volt relationship 6.241 509 126 e18 0.000 000 038 e18 eV

965joule-hartree relationship 2.293 712 317 e17 0.000 000 028 e17 E_h

966joule-hertz relationship 1.509 190 205 e33 0.000 000 019 e33 Hz

967joule-inverse meter relationship 5.034 116 651 e24 0.000 000 062 e24 m^-1

968joule-kelvin relationship 7.242 9731 e22 0.000 0042 e22 K

969joule-kilogram relationship 1.112 650 056... e-17 (exact) kg

970kelvin-atomic mass unit relationship 9.251 0842 e-14 0.000 0053 e-14 u

971kelvin-electron volt relationship 8.617 3303 e-5 0.000 0050 e-5 eV

972kelvin-hartree relationship 3.166 8105 e-6 0.000 0018 e-6 E_h

973kelvin-hertz relationship 2.083 6612 e10 0.000 0012 e10 Hz

974kelvin-inverse meter relationship 69.503 457 0.000 040 m^-1

975kelvin-joule relationship 1.380 648 52 e-23 0.000 000 79 e-23 J

976kelvin-kilogram relationship 1.536 178 65 e-40 0.000 000 88 e-40 kg

977kilogram-atomic mass unit relationship 6.022 140 857 e26 0.000 000 074 e26 u

978kilogram-electron volt relationship 5.609 588 650 e35 0.000 000 034 e35 eV

979kilogram-hartree relationship 2.061 485 823 e34 0.000 000 025 e34 E_h

980kilogram-hertz relationship 1.356 392 512 e50 0.000 000 017 e50 Hz

981kilogram-inverse meter relationship 4.524 438 411 e41 0.000 000 056 e41 m^-1

982kilogram-joule relationship 8.987 551 787... e16 (exact) J

983kilogram-kelvin relationship 6.509 6595 e39 0.000 0037 e39 K

984lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

985Loschmidt constant (273.15 K, 100 kPa) 2.651 6467 e25 0.000 0015 e25 m^-3

986Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 0.000 0015 e25 m^-3

987mag. constant 12.566 370 614... e-7 (exact) N A^-2

988mag. flux quantum 2.067 833 831 e-15 0.000 000 013 e-15 Wb

989molar gas constant 8.314 4598 0.000 0048 J mol^-1 K^-1

990molar mass constant 1 e-3 (exact) kg mol^-1

991molar mass of carbon-12 12 e-3 (exact) kg mol^-1

992molar Planck constant 3.990 312 7110 e-10 0.000 000 0018 e-10 J s mol^-1

993molar Planck constant times c 0.119 626 565 582 0.000 000 000 054 J m mol^-1

994molar volume of ideal gas (273.15 K, 100 kPa) 22.710 947 e-3 0.000 013 e-3 m^3 mol^-1

995molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 962 e-3 0.000 013 e-3 m^3 mol^-1

996molar volume of silicon 12.058 832 14 e-6 0.000 000 61 e-6 m^3 mol^-1

997Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

998muon Compton wavelength 11.734 441 11 e-15 0.000 000 26 e-15 m

999muon Compton wavelength over 2 pi 1.867 594 308 e-15 0.000 000 042 e-15 m

1000muon-electron mass ratio 206.768 2826 0.000 0046

1001muon g factor -2.002 331 8418 0.000 000 0013

1002muon mag. mom. -4.490 448 26 e-26 0.000 000 10 e-26 J T^-1

1003muon mag. mom. anomaly 1.165 920 89 e-3 0.000 000 63 e-3

1004muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 0.000 000 11 e-3

1005muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 20

1006muon mass 1.883 531 594 e-28 0.000 000 048 e-28 kg

1007muon mass energy equivalent 1.692 833 774 e-11 0.000 000 043 e-11 J

1008muon mass energy equivalent in MeV 105.658 3745 0.000 0024 MeV

1009muon mass in u 0.113 428 9257 0.000 000 0025 u

1010muon molar mass 0.113 428 9257 e-3 0.000 000 0025 e-3 kg mol^-1

1011muon-neutron mass ratio 0.112 454 5167 0.000 000 0025

1012muon-proton mag. mom. ratio -3.183 345 142 0.000 000 071

1013muon-proton mass ratio 0.112 609 5262 0.000 000 0025

1014muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2

1015natural unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

1016natural unit of action in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

1017natural unit of energy 8.187 105 65 e-14 0.000 000 10 e-14 J

1018natural unit of energy in MeV 0.510 998 9461 0.000 000 0031 MeV

1019natural unit of length 386.159 267 64 e-15 0.000 000 18 e-15 m

1020natural unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

1021natural unit of mom.um 2.730 924 488 e-22 0.000 000 034 e-22 kg m s^-1

1022natural unit of mom.um in MeV/c 0.510 998 9461 0.000 000 0031 MeV/c

1023natural unit of time 1.288 088 667 12 e-21 0.000 000 000 58 e-21 s

1024natural unit of velocity 299 792 458 (exact) m s^-1

1025neutron Compton wavelength 1.319 590 904 81 e-15 0.000 000 000 88 e-15 m

1026neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 0.000 000 000 14 e-15 m

1027neutron-electron mag. mom. ratio 1.040 668 82 e-3 0.000 000 25 e-3

1028neutron-electron mass ratio 1838.683 661 58 0.000 000 90

1029neutron g factor -3.826 085 45 0.000 000 90

1030neutron gyromag. ratio 1.832 471 72 e8 0.000 000 43 e8 s^-1 T^-1

1031neutron gyromag. ratio over 2 pi 29.164 6933 0.000 0069 MHz T^-1

1032neutron mag. mom. -0.966 236 50 e-26 0.000 000 23 e-26 J T^-1

1033neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3

1034neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45

1035neutron mass 1.674 927 471 e-27 0.000 000 021 e-27 kg

1036neutron mass energy equivalent 1.505 349 739 e-10 0.000 000 019 e-10 J

1037neutron mass energy equivalent in MeV 939.565 4133 0.000 0058 MeV

1038neutron mass in u 1.008 664 915 88 0.000 000 000 49 u

1039neutron molar mass 1.008 664 915 88 e-3 0.000 000 000 49 e-3 kg mol^-1

1040neutron-muon mass ratio 8.892 484 08 0.000 000 20

1041neutron-proton mag. mom. ratio -0.684 979 34 0.000 000 16

1042neutron-proton mass difference 2.305 573 77 e-30 0.000 000 85 e-30

1043neutron-proton mass difference energy equivalent 2.072 146 37 e-13 0.000 000 76 e-13

1044neutron-proton mass difference energy equivalent in MeV 1.293 332 05 0.000 000 48

1045neutron-proton mass difference in u 0.001 388 449 00 0.000 000 000 51

1046neutron-proton mass ratio 1.001 378 418 98 0.000 000 000 51

1047neutron-tau mass ratio 0.528 790 0.000 048

1048neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16

1049Newtonian constant of gravitation 6.674 08 e-11 0.000 31 e-11 m^3 kg^-1 s^-2

1050Newtonian constant of gravitation over h-bar c 6.708 61 e-39 0.000 31 e-39 (GeV/c^2)^-2

1051nuclear magneton 5.050 783 699 e-27 0.000 000 031 e-27 J T^-1

1052nuclear magneton in eV/T 3.152 451 2550 e-8 0.000 000 0015 e-8 eV T^-1

1053nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 0.000 000 016 e-2 m^-1 T^-1

1054nuclear magneton in K/T 3.658 2690 e-4 0.000 0021 e-4 K T^-1

1055nuclear magneton in MHz/T 7.622 593 285 0.000 000 047 MHz T^-1

1056Planck constant 6.626 070 040 e-34 0.000 000 081 e-34 J s

1057Planck constant in eV s 4.135 667 662 e-15 0.000 000 025 e-15 eV s

1058Planck constant over 2 pi 1.054 571 800 e-34 0.000 000 013 e-34 J s

1059Planck constant over 2 pi in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

1060Planck constant over 2 pi times c in MeV fm 197.326 9788 0.000 0012 MeV fm

1061Planck length 1.616 229 e-35 0.000 038 e-35 m

1062Planck mass 2.176 470 e-8 0.000 051 e-8 kg

1063Planck mass energy equivalent in GeV 1.220 910 e19 0.000 029 e19 GeV

1064Planck temperature 1.416 808 e32 0.000 033 e32 K

1065Planck time 5.391 16 e-44 0.000 13 e-44 s

1066proton charge to mass quotient 9.578 833 226 e7 0.000 000 059 e7 C kg^-1

1067proton Compton wavelength 1.321 409 853 96 e-15 0.000 000 000 61 e-15 m

1068proton Compton wavelength over 2 pi 0.210 308910109e-15 0.000 000 000097e-15 m

1069proton-electron mass ratio 1836.152 673 89 0.000 000 17

1070proton g factor 5.585 694 702 0.000 000 017

1071proton gyromag. ratio 2.675 221 900 e8 0.000 000 018 e8 s^-1 T^-1

1072proton gyromag. ratio over 2 pi 42.577 478 92 0.000 000 29 MHz T^-1

1073proton mag. mom. 1.410 606 7873 e-26 0.000 000 0097 e-26 J T^-1

1074proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 0.000 000 0046 e-3

1075proton mag. mom. to nuclear magneton ratio 2.792 847 3508 0.000 000 0085

1076proton mag. shielding correction 25.691 e-6 0.011 e-6

1077proton mass 1.672 621 898 e-27 0.000 000 021 e-27 kg

1078proton mass energy equivalent 1.503 277 593 e-10 0.000 000 018 e-10 J

1079proton mass energy equivalent in MeV 938.272 0813 0.000 0058 MeV

1080proton mass in u 1.007 276 466 879 0.000 000 000 091 u

1081proton molar mass 1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1

1082proton-muon mass ratio 8.880 243 38 0.000 000 20

1083proton-neutron mag. mom. ratio -1.459 898 05 0.000 000 34

1084proton-neutron mass ratio 0.998 623 478 44 0.000 000 000 51

1085proton rms charge radius 0.8751 e-15 0.0061 e-15 m

1086proton-tau mass ratio 0.528 063 0.000 048

1087quantum of circulation 3.636 947 5486 e-4 0.000 000 0017 e-4 m^2 s^-1

1088quantum of circulation times 2 7.273 895 0972 e-4 0.000 000 0033 e-4 m^2 s^-1

1089Rydberg constant 10 973 731.568 508 0.000 065 m^-1

1090Rydberg constant times c in Hz 3.289 841 960 355 e15 0.000 000 000 019 e15 Hz

1091Rydberg constant times hc in eV 13.605 693 009 0.000 000 084 eV

1092Rydberg constant times hc in J 2.179 872 325 e-18 0.000 000 027 e-18 J

1093Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 0.000 0014

1094Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 0.000 0014

1095second radiation constant 1.438 777 36 e-2 0.000 000 83 e-2 m K

1096shielded helion gyromag. ratio 2.037 894 585 e8 0.000 000 027 e8 s^-1 T^-1

1097shielded helion gyromag. ratio over 2 pi 32.434 099 66 0.000 000 43 MHz T^-1

1098shielded helion mag. mom. -1.074 553 080 e-26 0.000 000 014 e-26 J T^-1

1099shielded helion mag. mom. to Bohr magneton ratio -1.158 671 471 e-3 0.000 000 014 e-3

1100shielded helion mag. mom. to nuclear magneton ratio -2.127 497 720 0.000 000 025

1101shielded helion to proton mag. mom. ratio -0.761 766 5603 0.000 000 0092

1102shielded helion to shielded proton mag. mom. ratio -0.761 786 1313 0.000 000 0033

1103shielded proton gyromag. ratio 2.675 153 171 e8 0.000 000 033 e8 s^-1 T^-1

1104shielded proton gyromag. ratio over 2 pi 42.576 385 07 0.000 000 53 MHz T^-1

1105shielded proton mag. mom. 1.410 570 547 e-26 0.000 000 018 e-26 J T^-1

1106shielded proton mag. mom. to Bohr magneton ratio 1.520 993 128 e-3 0.000 000 017 e-3

1107shielded proton mag. mom. to nuclear magneton ratio 2.792 775 600 0.000 000 030

1108speed of light in vacuum 299 792 458 (exact) m s^-1

1109standard acceleration of gravity 9.806 65 (exact) m s^-2

1110standard atmosphere 101 325 (exact) Pa

1111standard-state pressure 100 000 (exact) Pa

1112Stefan-Boltzmann constant 5.670 367 e-8 0.000 013 e-8 W m^-2 K^-4

1113tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

1114tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

1115tau-electron mass ratio 3477.15 0.31

1116tau mass 3.167 47 e-27 0.000 29 e-27 kg

1117tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

1118tau mass energy equivalent in MeV 1776.82 0.16 MeV

1119tau mass in u 1.907 49 0.000 17 u

1120tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

1121tau-muon mass ratio 16.8167 0.0015

1122tau-neutron mass ratio 1.891 11 0.000 17

1123tau-proton mass ratio 1.893 72 0.000 17

1124Thomson cross section 0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2

1125triton-electron mass ratio 5496.921 535 88 0.000 000 26

1126triton g factor 5.957 924 920 0.000 000 028

1127triton mag. mom. 1.504 609 503 e-26 0.000 000 012 e-26 J T^-1

1128triton mag. mom. to Bohr magneton ratio 1.622 393 6616 e-3 0.000 000 0076 e-3

1129triton mag. mom. to nuclear magneton ratio 2.978 962 460 0.000 000 014

1130triton mass 5.007 356 665 e-27 0.000 000 062 e-27 kg

1131triton mass energy equivalent 4.500 387 735 e-10 0.000 000 055 e-10 J

1132triton mass energy equivalent in MeV 2808.921 112 0.000 017 MeV

1133triton mass in u 3.015 500 716 32 0.000 000 000 11 u

1134triton molar mass 3.015 500 716 32 e-3 0.000 000 000 11 e-3 kg mol^-1

1135triton-proton mass ratio 2.993 717 033 48 0.000 000 000 22

1136unified atomic mass unit 1.660 539 040 e-27 0.000 000 020 e-27 kg

1137von Klitzing constant 25 812.807 4555 0.000 0059 ohm

1138weak mixing angle 0.2223 0.0021

1139Wien frequency displacement law constant 5.878 9238 e10 0.000 0034 e10 Hz K^-1

1140Wien wavelength displacement law constant 2.897 7729 e-3 0.000 0017 e-3 m K"""

1141

1142txt2018 = """\

1143alpha particle-electron mass ratio 7294.299 541 42 0.000 000 24

1144alpha particle mass 6.644 657 3357 e-27 0.000 000 0020 e-27 kg

1145alpha particle mass energy equivalent 5.971 920 1914 e-10 0.000 000 0018 e-10 J

1146alpha particle mass energy equivalent in MeV 3727.379 4066 0.000 0011 MeV

1147alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

1148alpha particle molar mass 4.001 506 1777 e-3 0.000 000 0012 e-3 kg mol^-1

1149alpha particle-proton mass ratio 3.972 599 690 09 0.000 000 000 22

1150alpha particle relative atomic mass 4.001 506 179 127 0.000 000 000 063

1151Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

1152atomic mass constant 1.660 539 066 60 e-27 0.000 000 000 50 e-27 kg

1153atomic mass constant energy equivalent 1.492 418 085 60 e-10 0.000 000 000 45 e-10 J

1154atomic mass constant energy equivalent in MeV 931.494 102 42 0.000 000 28 MeV

1155atomic mass unit-electron volt relationship 9.314 941 0242 e8 0.000 000 0028 e8 eV

1156atomic mass unit-hartree relationship 3.423 177 6874 e7 0.000 000 0010 e7 E_h

1157atomic mass unit-hertz relationship 2.252 342 718 71 e23 0.000 000 000 68 e23 Hz

1158atomic mass unit-inverse meter relationship 7.513 006 6104 e14 0.000 000 0023 e14 m^-1

1159atomic mass unit-joule relationship 1.492 418 085 60 e-10 0.000 000 000 45 e-10 J

1160atomic mass unit-kelvin relationship 1.080 954 019 16 e13 0.000 000 000 33 e13 K

1161atomic mass unit-kilogram relationship 1.660 539 066 60 e-27 0.000 000 000 50 e-27 kg

1162atomic unit of 1st hyperpolarizability 3.206 361 3061 e-53 0.000 000 0015 e-53 C^3 m^3 J^-2

1163atomic unit of 2nd hyperpolarizability 6.235 379 9905 e-65 0.000 000 0038 e-65 C^4 m^4 J^-3

1164atomic unit of action 1.054 571 817... e-34 (exact) J s

1165atomic unit of charge 1.602 176 634 e-19 (exact) C

1166atomic unit of charge density 1.081 202 384 57 e12 0.000 000 000 49 e12 C m^-3

1167atomic unit of current 6.623 618 237 510 e-3 0.000 000 000 013 e-3 A

1168atomic unit of electric dipole mom. 8.478 353 6255 e-30 0.000 000 0013 e-30 C m

1169atomic unit of electric field 5.142 206 747 63 e11 0.000 000 000 78 e11 V m^-1

1170atomic unit of electric field gradient 9.717 362 4292 e21 0.000 000 0029 e21 V m^-2

1171atomic unit of electric polarizability 1.648 777 274 36 e-41 0.000 000 000 50 e-41 C^2 m^2 J^-1

1172atomic unit of electric potential 27.211 386 245 988 0.000 000 000 053 V

1173atomic unit of electric quadrupole mom. 4.486 551 5246 e-40 0.000 000 0014 e-40 C m^2

1174atomic unit of energy 4.359 744 722 2071 e-18 0.000 000 000 0085 e-18 J

1175atomic unit of force 8.238 723 4983 e-8 0.000 000 0012 e-8 N

1176atomic unit of length 5.291 772 109 03 e-11 0.000 000 000 80 e-11 m

1177atomic unit of mag. dipole mom. 1.854 802 015 66 e-23 0.000 000 000 56 e-23 J T^-1

1178atomic unit of mag. flux density 2.350 517 567 58 e5 0.000 000 000 71 e5 T

1179atomic unit of magnetizability 7.891 036 6008 e-29 0.000 000 0048 e-29 J T^-2

1180atomic unit of mass 9.109 383 7015 e-31 0.000 000 0028 e-31 kg

1181atomic unit of momentum 1.992 851 914 10 e-24 0.000 000 000 30 e-24 kg m s^-1

1182atomic unit of permittivity 1.112 650 055 45 e-10 0.000 000 000 17 e-10 F m^-1

1183atomic unit of time 2.418 884 326 5857 e-17 0.000 000 000 0047 e-17 s

1184atomic unit of velocity 2.187 691 263 64 e6 0.000 000 000 33 e6 m s^-1

1185Avogadro constant 6.022 140 76 e23 (exact) mol^-1

1186Bohr magneton 9.274 010 0783 e-24 0.000 000 0028 e-24 J T^-1

1187Bohr magneton in eV/T 5.788 381 8060 e-5 0.000 000 0017 e-5 eV T^-1

1188Bohr magneton in Hz/T 1.399 624 493 61 e10 0.000 000 000 42 e10 Hz T^-1

1189Bohr magneton in inverse meter per tesla 46.686 447 783 0.000 000 014 m^-1 T^-1

1190Bohr magneton in K/T 0.671 713 815 63 0.000 000 000 20 K T^-1

1191Bohr radius 5.291 772 109 03 e-11 0.000 000 000 80 e-11 m

1192Boltzmann constant 1.380 649 e-23 (exact) J K^-1

1193Boltzmann constant in eV/K 8.617 333 262... e-5 (exact) eV K^-1

1194Boltzmann constant in Hz/K 2.083 661 912... e10 (exact) Hz K^-1

1195Boltzmann constant in inverse meter per kelvin 69.503 480 04... (exact) m^-1 K^-1

1196characteristic impedance of vacuum 376.730 313 668 0.000 000 057 ohm

1197classical electron radius 2.817 940 3262 e-15 0.000 000 0013 e-15 m

1198Compton wavelength 2.426 310 238 67 e-12 0.000 000 000 73 e-12 m

1199conductance quantum 7.748 091 729... e-5 (exact) S

1200conventional value of ampere-90 1.000 000 088 87... (exact) A

1201conventional value of coulomb-90 1.000 000 088 87... (exact) C

1202conventional value of farad-90 0.999 999 982 20... (exact) F

1203conventional value of henry-90 1.000 000 017 79... (exact) H

1204conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

1205conventional value of ohm-90 1.000 000 017 79... (exact) ohm

1206conventional value of volt-90 1.000 000 106 66... (exact) V

1207conventional value of von Klitzing constant 25 812.807 (exact) ohm

1208conventional value of watt-90 1.000 000 195 53... (exact) W

1209Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

1210deuteron-electron mag. mom. ratio -4.664 345 551 e-4 0.000 000 012 e-4

1211deuteron-electron mass ratio 3670.482 967 88 0.000 000 13

1212deuteron g factor 0.857 438 2338 0.000 000 0022

1213deuteron mag. mom. 4.330 735 094 e-27 0.000 000 011 e-27 J T^-1

1214deuteron mag. mom. to Bohr magneton ratio 4.669 754 570 e-4 0.000 000 012 e-4

1215deuteron mag. mom. to nuclear magneton ratio 0.857 438 2338 0.000 000 0022

1216deuteron mass 3.343 583 7724 e-27 0.000 000 0010 e-27 kg

1217deuteron mass energy equivalent 3.005 063 231 02 e-10 0.000 000 000 91 e-10 J

1218deuteron mass energy equivalent in MeV 1875.612 942 57 0.000 000 57 MeV

1219deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

1220deuteron molar mass 2.013 553 212 05 e-3 0.000 000 000 61 e-3 kg mol^-1

1221deuteron-neutron mag. mom. ratio -0.448 206 53 0.000 000 11

1222deuteron-proton mag. mom. ratio 0.307 012 209 39 0.000 000 000 79

1223deuteron-proton mass ratio 1.999 007 501 39 0.000 000 000 11

1224deuteron relative atomic mass 2.013 553 212 745 0.000 000 000 040

1225deuteron rms charge radius 2.127 99 e-15 0.000 74 e-15 m

1226electron charge to mass quotient -1.758 820 010 76 e11 0.000 000 000 53 e11 C kg^-1

1227electron-deuteron mag. mom. ratio -2143.923 4915 0.000 0056

1228electron-deuteron mass ratio 2.724 437 107 462 e-4 0.000 000 000 096 e-4

1229electron g factor -2.002 319 304 362 56 0.000 000 000 000 35

1230electron gyromag. ratio 1.760 859 630 23 e11 0.000 000 000 53 e11 s^-1 T^-1

1231electron gyromag. ratio in MHz/T 28 024.951 4242 0.000 0085 MHz T^-1

1232electron-helion mass ratio 1.819 543 074 573 e-4 0.000 000 000 079 e-4

1233electron mag. mom. -9.284 764 7043 e-24 0.000 000 0028 e-24 J T^-1

1234electron mag. mom. anomaly 1.159 652 181 28 e-3 0.000 000 000 18 e-3

1235electron mag. mom. to Bohr magneton ratio -1.001 159 652 181 28 0.000 000 000 000 18

1236electron mag. mom. to nuclear magneton ratio -1838.281 971 88 0.000 000 11

1237electron mass 9.109 383 7015 e-31 0.000 000 0028 e-31 kg

1238electron mass energy equivalent 8.187 105 7769 e-14 0.000 000 0025 e-14 J

1239electron mass energy equivalent in MeV 0.510 998 950 00 0.000 000 000 15 MeV

1240electron mass in u 5.485 799 090 65 e-4 0.000 000 000 16 e-4 u

1241electron molar mass 5.485 799 0888 e-7 0.000 000 0017 e-7 kg mol^-1

1242electron-muon mag. mom. ratio 206.766 9883 0.000 0046

1243electron-muon mass ratio 4.836 331 69 e-3 0.000 000 11 e-3

1244electron-neutron mag. mom. ratio 960.920 50 0.000 23

1245electron-neutron mass ratio 5.438 673 4424 e-4 0.000 000 0026 e-4

1246electron-proton mag. mom. ratio -658.210 687 89 0.000 000 20

1247electron-proton mass ratio 5.446 170 214 87 e-4 0.000 000 000 33 e-4

1248electron relative atomic mass 5.485 799 090 65 e-4 0.000 000 000 16 e-4

1249electron-tau mass ratio 2.875 85 e-4 0.000 19 e-4

1250electron to alpha particle mass ratio 1.370 933 554 787 e-4 0.000 000 000 045 e-4

1251electron to shielded helion mag. mom. ratio 864.058 257 0.000 010

1252electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072

1253electron-triton mass ratio 1.819 200 062 251 e-4 0.000 000 000 090 e-4

1254electron volt 1.602 176 634 e-19 (exact) J

1255electron volt-atomic mass unit relationship 1.073 544 102 33 e-9 0.000 000 000 32 e-9 u

1256electron volt-hartree relationship 3.674 932 217 5655 e-2 0.000 000 000 0071 e-2 E_h

1257electron volt-hertz relationship 2.417 989 242... e14 (exact) Hz

1258electron volt-inverse meter relationship 8.065 543 937... e5 (exact) m^-1

1259electron volt-joule relationship 1.602 176 634 e-19 (exact) J

1260electron volt-kelvin relationship 1.160 451 812... e4 (exact) K

1261electron volt-kilogram relationship 1.782 661 921... e-36 (exact) kg

1262elementary charge 1.602 176 634 e-19 (exact) C

1263elementary charge over h-bar 1.519 267 447... e15 (exact) A J^-1

1264Faraday constant 96 485.332 12... (exact) C mol^-1

1265Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

1266fine-structure constant 7.297 352 5693 e-3 0.000 000 0011 e-3

1267first radiation constant 3.741 771 852... e-16 (exact) W m^2

1268first radiation constant for spectral radiance 1.191 042 972... e-16 (exact) W m^2 sr^-1

1269hartree-atomic mass unit relationship 2.921 262 322 05 e-8 0.000 000 000 88 e-8 u

1270hartree-electron volt relationship 27.211 386 245 988 0.000 000 000 053 eV

1271Hartree energy 4.359 744 722 2071 e-18 0.000 000 000 0085 e-18 J

1272Hartree energy in eV 27.211 386 245 988 0.000 000 000 053 eV

1273hartree-hertz relationship 6.579 683 920 502 e15 0.000 000 000 013 e15 Hz

1274hartree-inverse meter relationship 2.194 746 313 6320 e7 0.000 000 000 0043 e7 m^-1

1275hartree-joule relationship 4.359 744 722 2071 e-18 0.000 000 000 0085 e-18 J

1276hartree-kelvin relationship 3.157 750 248 0407 e5 0.000 000 000 0061 e5 K

1277hartree-kilogram relationship 4.850 870 209 5432 e-35 0.000 000 000 0094 e-35 kg

1278helion-electron mass ratio 5495.885 280 07 0.000 000 24

1279helion g factor -4.255 250 615 0.000 000 050

1280helion mag. mom. -1.074 617 532 e-26 0.000 000 013 e-26 J T^-1

1281helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3

1282helion mag. mom. to nuclear magneton ratio -2.127 625 307 0.000 000 025

1283helion mass 5.006 412 7796 e-27 0.000 000 0015 e-27 kg

1284helion mass energy equivalent 4.499 539 4125 e-10 0.000 000 0014 e-10 J

1285helion mass energy equivalent in MeV 2808.391 607 43 0.000 000 85 MeV

1286helion mass in u 3.014 932 247 175 0.000 000 000 097 u

1287helion molar mass 3.014 932 246 13 e-3 0.000 000 000 91 e-3 kg mol^-1

1288helion-proton mass ratio 2.993 152 671 67 0.000 000 000 13

1289helion relative atomic mass 3.014 932 247 175 0.000 000 000 097

1290helion shielding shift 5.996 743 e-5 0.000 010 e-5

1291hertz-atomic mass unit relationship 4.439 821 6652 e-24 0.000 000 0013 e-24 u

1292hertz-electron volt relationship 4.135 667 696... e-15 (exact) eV

1293hertz-hartree relationship 1.519 829 846 0570 e-16 0.000 000 000 0029 e-16 E_h

1294hertz-inverse meter relationship 3.335 640 951... e-9 (exact) m^-1

1295hertz-joule relationship 6.626 070 15 e-34 (exact) J

1296hertz-kelvin relationship 4.799 243 073... e-11 (exact) K

1297hertz-kilogram relationship 7.372 497 323... e-51 (exact) kg

1298hyperfine transition frequency of Cs-133 9 192 631 770 (exact) Hz

1299inverse fine-structure constant 137.035 999 084 0.000 000 021

1300inverse meter-atomic mass unit relationship 1.331 025 050 10 e-15 0.000 000 000 40 e-15 u

1301inverse meter-electron volt relationship 1.239 841 984... e-6 (exact) eV

1302inverse meter-hartree relationship 4.556 335 252 9120 e-8 0.000 000 000 0088 e-8 E_h

1303inverse meter-hertz relationship 299 792 458 (exact) Hz

1304inverse meter-joule relationship 1.986 445 857... e-25 (exact) J

1305inverse meter-kelvin relationship 1.438 776 877... e-2 (exact) K

1306inverse meter-kilogram relationship 2.210 219 094... e-42 (exact) kg

1307inverse of conductance quantum 12 906.403 72... (exact) ohm

1308Josephson constant 483 597.848 4... e9 (exact) Hz V^-1

1309joule-atomic mass unit relationship 6.700 535 2565 e9 0.000 000 0020 e9 u

1310joule-electron volt relationship 6.241 509 074... e18 (exact) eV

1311joule-hartree relationship 2.293 712 278 3963 e17 0.000 000 000 0045 e17 E_h

1312joule-hertz relationship 1.509 190 179... e33 (exact) Hz

1313joule-inverse meter relationship 5.034 116 567... e24 (exact) m^-1

1314joule-kelvin relationship 7.242 970 516... e22 (exact) K

1315joule-kilogram relationship 1.112 650 056... e-17 (exact) kg

1316kelvin-atomic mass unit relationship 9.251 087 3014 e-14 0.000 000 0028 e-14 u

1317kelvin-electron volt relationship 8.617 333 262... e-5 (exact) eV

1318kelvin-hartree relationship 3.166 811 563 4556 e-6 0.000 000 000 0061 e-6 E_h

1319kelvin-hertz relationship 2.083 661 912... e10 (exact) Hz

1320kelvin-inverse meter relationship 69.503 480 04... (exact) m^-1

1321kelvin-joule relationship 1.380 649 e-23 (exact) J

1322kelvin-kilogram relationship 1.536 179 187... e-40 (exact) kg

1323kilogram-atomic mass unit relationship 6.022 140 7621 e26 0.000 000 0018 e26 u

1324kilogram-electron volt relationship 5.609 588 603... e35 (exact) eV

1325kilogram-hartree relationship 2.061 485 788 7409 e34 0.000 000 000 0040 e34 E_h

1326kilogram-hertz relationship 1.356 392 489... e50 (exact) Hz

1327kilogram-inverse meter relationship 4.524 438 335... e41 (exact) m^-1

1328kilogram-joule relationship 8.987 551 787... e16 (exact) J

1329kilogram-kelvin relationship 6.509 657 260... e39 (exact) K

1330lattice parameter of silicon 5.431 020 511 e-10 0.000 000 089 e-10 m

1331lattice spacing of ideal Si (220) 1.920 155 716 e-10 0.000 000 032 e-10 m

1332Loschmidt constant (273.15 K, 100 kPa) 2.651 645 804... e25 (exact) m^-3

1333Loschmidt constant (273.15 K, 101.325 kPa) 2.686 780 111... e25 (exact) m^-3

1334luminous efficacy 683 (exact) lm W^-1

1335mag. flux quantum 2.067 833 848... e-15 (exact) Wb

1336molar gas constant 8.314 462 618... (exact) J mol^-1 K^-1

1337molar mass constant 0.999 999 999 65 e-3 0.000 000 000 30 e-3 kg mol^-1

1338molar mass of carbon-12 11.999 999 9958 e-3 0.000 000 0036 e-3 kg mol^-1

1339molar Planck constant 3.990 312 712... e-10 (exact) J Hz^-1 mol^-1

1340molar volume of ideal gas (273.15 K, 100 kPa) 22.710 954 64... e-3 (exact) m^3 mol^-1

1341molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 969 54... e-3 (exact) m^3 mol^-1

1342molar volume of silicon 1.205 883 199 e-5 0.000 000 060 e-5 m^3 mol^-1

1343Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

1344muon Compton wavelength 1.173 444 110 e-14 0.000 000 026 e-14 m

1345muon-electron mass ratio 206.768 2830 0.000 0046

1346muon g factor -2.002 331 8418 0.000 000 0013

1347muon mag. mom. -4.490 448 30 e-26 0.000 000 10 e-26 J T^-1

1348muon mag. mom. anomaly 1.165 920 89 e-3 0.000 000 63 e-3

1349muon mag. mom. to Bohr magneton ratio -4.841 970 47 e-3 0.000 000 11 e-3

1350muon mag. mom. to nuclear magneton ratio -8.890 597 03 0.000 000 20

1351muon mass 1.883 531 627 e-28 0.000 000 042 e-28 kg

1352muon mass energy equivalent 1.692 833 804 e-11 0.000 000 038 e-11 J

1353muon mass energy equivalent in MeV 105.658 3755 0.000 0023 MeV

1354muon mass in u 0.113 428 9259 0.000 000 0025 u

1355muon molar mass 1.134 289 259 e-4 0.000 000 025 e-4 kg mol^-1

1356muon-neutron mass ratio 0.112 454 5170 0.000 000 0025

1357muon-proton mag. mom. ratio -3.183 345 142 0.000 000 071

1358muon-proton mass ratio 0.112 609 5264 0.000 000 0025

1359muon-tau mass ratio 5.946 35 e-2 0.000 40 e-2

1360natural unit of action 1.054 571 817... e-34 (exact) J s

1361natural unit of action in eV s 6.582 119 569... e-16 (exact) eV s

1362natural unit of energy 8.187 105 7769 e-14 0.000 000 0025 e-14 J

1363natural unit of energy in MeV 0.510 998 950 00 0.000 000 000 15 MeV

1364natural unit of length 3.861 592 6796 e-13 0.000 000 0012 e-13 m

1365natural unit of mass 9.109 383 7015 e-31 0.000 000 0028 e-31 kg

1366natural unit of momentum 2.730 924 530 75 e-22 0.000 000 000 82 e-22 kg m s^-1

1367natural unit of momentum in MeV/c 0.510 998 950 00 0.000 000 000 15 MeV/c

1368natural unit of time 1.288 088 668 19 e-21 0.000 000 000 39 e-21 s

1369natural unit of velocity 299 792 458 (exact) m s^-1

1370neutron Compton wavelength 1.319 590 905 81 e-15 0.000 000 000 75 e-15 m

1371neutron-electron mag. mom. ratio 1.040 668 82 e-3 0.000 000 25 e-3

1372neutron-electron mass ratio 1838.683 661 73 0.000 000 89

1373neutron g factor -3.826 085 45 0.000 000 90

1374neutron gyromag. ratio 1.832 471 71 e8 0.000 000 43 e8 s^-1 T^-1

1375neutron gyromag. ratio in MHz/T 29.164 6931 0.000 0069 MHz T^-1

1376neutron mag. mom. -9.662 3651 e-27 0.000 0023 e-27 J T^-1

1377neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3

1378neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45

1379neutron mass 1.674 927 498 04 e-27 0.000 000 000 95 e-27 kg

1380neutron mass energy equivalent 1.505 349 762 87 e-10 0.000 000 000 86 e-10 J

1381neutron mass energy equivalent in MeV 939.565 420 52 0.000 000 54 MeV

1382neutron mass in u 1.008 664 915 95 0.000 000 000 49 u

1383neutron molar mass 1.008 664 915 60 e-3 0.000 000 000 57 e-3 kg mol^-1

1384neutron-muon mass ratio 8.892 484 06 0.000 000 20

1385neutron-proton mag. mom. ratio -0.684 979 34 0.000 000 16

1386neutron-proton mass difference 2.305 574 35 e-30 0.000 000 82 e-30 kg

1387neutron-proton mass difference energy equivalent 2.072 146 89 e-13 0.000 000 74 e-13 J

1388neutron-proton mass difference energy equivalent in MeV 1.293 332 36 0.000 000 46 MeV

1389neutron-proton mass difference in u 1.388 449 33 e-3 0.000 000 49 e-3 u

1390neutron-proton mass ratio 1.001 378 419 31 0.000 000 000 49

1391neutron relative atomic mass 1.008 664 915 95 0.000 000 000 49

1392neutron-tau mass ratio 0.528 779 0.000 036

1393neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16

1394Newtonian constant of gravitation 6.674 30 e-11 0.000 15 e-11 m^3 kg^-1 s^-2

1395Newtonian constant of gravitation over h-bar c 6.708 83 e-39 0.000 15 e-39 (GeV/c^2)^-2

1396nuclear magneton 5.050 783 7461 e-27 0.000 000 0015 e-27 J T^-1

1397nuclear magneton in eV/T 3.152 451 258 44 e-8 0.000 000 000 96 e-8 eV T^-1

1398nuclear magneton in inverse meter per tesla 2.542 623 413 53 e-2 0.000 000 000 78 e-2 m^-1 T^-1

1399nuclear magneton in K/T 3.658 267 7756 e-4 0.000 000 0011 e-4 K T^-1

1400nuclear magneton in MHz/T 7.622 593 2291 0.000 000 0023 MHz T^-1

1401Planck constant 6.626 070 15 e-34 (exact) J Hz^-1

1402Planck constant in eV/Hz 4.135 667 696... e-15 (exact) eV Hz^-1

1403Planck length 1.616 255 e-35 0.000 018 e-35 m

1404Planck mass 2.176 434 e-8 0.000 024 e-8 kg

1405Planck mass energy equivalent in GeV 1.220 890 e19 0.000 014 e19 GeV

1406Planck temperature 1.416 784 e32 0.000 016 e32 K

1407Planck time 5.391 247 e-44 0.000 060 e-44 s

1408proton charge to mass quotient 9.578 833 1560 e7 0.000 000 0029 e7 C kg^-1

1409proton Compton wavelength 1.321 409 855 39 e-15 0.000 000 000 40 e-15 m

1410proton-electron mass ratio 1836.152 673 43 0.000 000 11

1411proton g factor 5.585 694 6893 0.000 000 0016

1412proton gyromag. ratio 2.675 221 8744 e8 0.000 000 0011 e8 s^-1 T^-1

1413proton gyromag. ratio in MHz/T 42.577 478 518 0.000 000 018 MHz T^-1

1414proton mag. mom. 1.410 606 797 36 e-26 0.000 000 000 60 e-26 J T^-1

1415proton mag. mom. to Bohr magneton ratio 1.521 032 202 30 e-3 0.000 000 000 46 e-3

1416proton mag. mom. to nuclear magneton ratio 2.792 847 344 63 0.000 000 000 82

1417proton mag. shielding correction 2.5689 e-5 0.0011 e-5

1418proton mass 1.672 621 923 69 e-27 0.000 000 000 51 e-27 kg

1419proton mass energy equivalent 1.503 277 615 98 e-10 0.000 000 000 46 e-10 J

1420proton mass energy equivalent in MeV 938.272 088 16 0.000 000 29 MeV

1421proton mass in u 1.007 276 466 621 0.000 000 000 053 u

1422proton molar mass 1.007 276 466 27 e-3 0.000 000 000 31 e-3 kg mol^-1

1423proton-muon mass ratio 8.880 243 37 0.000 000 20

1424proton-neutron mag. mom. ratio -1.459 898 05 0.000 000 34

1425proton-neutron mass ratio 0.998 623 478 12 0.000 000 000 49

1426proton relative atomic mass 1.007 276 466 621 0.000 000 000 053

1427proton rms charge radius 8.414 e-16 0.019 e-16 m

1428proton-tau mass ratio 0.528 051 0.000 036

1429quantum of circulation 3.636 947 5516 e-4 0.000 000 0011 e-4 m^2 s^-1

1430quantum of circulation times 2 7.273 895 1032 e-4 0.000 000 0022 e-4 m^2 s^-1

1431reduced Compton wavelength 3.861 592 6796 e-13 0.000 000 0012 e-13 m

1432reduced muon Compton wavelength 1.867 594 306 e-15 0.000 000 042 e-15 m

1433reduced neutron Compton wavelength 2.100 194 1552 e-16 0.000 000 0012 e-16 m

1434reduced Planck constant 1.054 571 817... e-34 (exact) J s

1435reduced Planck constant in eV s 6.582 119 569... e-16 (exact) eV s

1436reduced Planck constant times c in MeV fm 197.326 980 4... (exact) MeV fm

1437reduced proton Compton wavelength 2.103 089 103 36 e-16 0.000 000 000 64 e-16 m

1438reduced tau Compton wavelength 1.110 538 e-16 0.000 075 e-16 m

1439Rydberg constant 10 973 731.568 160 0.000 021 m^-1

1440Rydberg constant times c in Hz 3.289 841 960 2508 e15 0.000 000 000 0064 e15 Hz

1441Rydberg constant times hc in eV 13.605 693 122 994 0.000 000 000 026 eV

1442Rydberg constant times hc in J 2.179 872 361 1035 e-18 0.000 000 000 0042 e-18 J

1443Sackur-Tetrode constant (1 K, 100 kPa) -1.151 707 537 06 0.000 000 000 45

1444Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 870 523 58 0.000 000 000 45

1445second radiation constant 1.438 776 877... e-2 (exact) m K

1446shielded helion gyromag. ratio 2.037 894 569 e8 0.000 000 024 e8 s^-1 T^-1

1447shielded helion gyromag. ratio in MHz/T 32.434 099 42 0.000 000 38 MHz T^-1

1448shielded helion mag. mom. -1.074 553 090 e-26 0.000 000 013 e-26 J T^-1

1449shielded helion mag. mom. to Bohr magneton ratio -1.158 671 471 e-3 0.000 000 014 e-3

1450shielded helion mag. mom. to nuclear magneton ratio -2.127 497 719 0.000 000 025

1451shielded helion to proton mag. mom. ratio -0.761 766 5618 0.000 000 0089

1452shielded helion to shielded proton mag. mom. ratio -0.761 786 1313 0.000 000 0033

1453shielded proton gyromag. ratio 2.675 153 151 e8 0.000 000 029 e8 s^-1 T^-1

1454shielded proton gyromag. ratio in MHz/T 42.576 384 74 0.000 000 46 MHz T^-1

1455shielded proton mag. mom. 1.410 570 560 e-26 0.000 000 015 e-26 J T^-1

1456shielded proton mag. mom. to Bohr magneton ratio 1.520 993 128 e-3 0.000 000 017 e-3

1457shielded proton mag. mom. to nuclear magneton ratio 2.792 775 599 0.000 000 030

1458shielding difference of d and p in HD 2.0200 e-8 0.0020 e-8

1459shielding difference of t and p in HT 2.4140 e-8 0.0020 e-8

1460speed of light in vacuum 299 792 458 (exact) m s^-1

1461standard acceleration of gravity 9.806 65 (exact) m s^-2

1462standard atmosphere 101 325 (exact) Pa

1463standard-state pressure 100 000 (exact) Pa

1464Stefan-Boltzmann constant 5.670 374 419... e-8 (exact) W m^-2 K^-4

1465tau Compton wavelength 6.977 71 e-16 0.000 47 e-16 m

1466tau-electron mass ratio 3477.23 0.23

1467tau energy equivalent 1776.86 0.12 MeV

1468tau mass 3.167 54 e-27 0.000 21 e-27 kg

1469tau mass energy equivalent 2.846 84 e-10 0.000 19 e-10 J

1470tau mass in u 1.907 54 0.000 13 u

1471tau molar mass 1.907 54 e-3 0.000 13 e-3 kg mol^-1

1472tau-muon mass ratio 16.8170 0.0011

1473tau-neutron mass ratio 1.891 15 0.000 13

1474tau-proton mass ratio 1.893 76 0.000 13

1475Thomson cross section 6.652 458 7321 e-29 0.000 000 0060 e-29 m^2

1476triton-electron mass ratio 5496.921 535 73 0.000 000 27

1477triton g factor 5.957 924 931 0.000 000 012

1478triton mag. mom. 1.504 609 5202 e-26 0.000 000 0030 e-26 J T^-1

1479triton mag. mom. to Bohr magneton ratio 1.622 393 6651 e-3 0.000 000 0032 e-3

1480triton mag. mom. to nuclear magneton ratio 2.978 962 4656 0.000 000 0059

1481triton mass 5.007 356 7446 e-27 0.000 000 0015 e-27 kg

1482triton mass energy equivalent 4.500 387 8060 e-10 0.000 000 0014 e-10 J

1483triton mass energy equivalent in MeV 2808.921 132 98 0.000 000 85 MeV

1484triton mass in u 3.015 500 716 21 0.000 000 000 12 u

1485triton molar mass 3.015 500 715 17 e-3 0.000 000 000 92 e-3 kg mol^-1

1486triton-proton mass ratio 2.993 717 034 14 0.000 000 000 15

1487triton relative atomic mass 3.015 500 716 21 0.000 000 000 12

1488triton to proton mag. mom. ratio 1.066 639 9191 0.000 000 0021

1489unified atomic mass unit 1.660 539 066 60 e-27 0.000 000 000 50 e-27 kg

1490vacuum electric permittivity 8.854 187 8128 e-12 0.000 000 0013 e-12 F m^-1

1491vacuum mag. permeability 1.256 637 062 12 e-6 0.000 000 000 19 e-6 N A^-2

1492von Klitzing constant 25 812.807 45... (exact) ohm

1493weak mixing angle 0.222 90 0.000 30

1494Wien frequency displacement law constant 5.878 925 757... e10 (exact) Hz K^-1

1495Wien wavelength displacement law constant 2.897 771 955... e-3 (exact) m K

1496W to Z mass ratio 0.881 53 0.000 17 """

1497

1498# -----------------------------------------------------------------------------

1499

1500physical_constants: dict[str, tuple[float, str, float]] = {}

1501

1502

1503def parse_constants_2002to2014(d: str) -> dict[str, tuple[float, str, float]]:

1504 constants = {}

1505 for line in d.split('\n'):

1506 name = line[:55].rstrip()

1507 val = float(line[55:77].replace(' ', '').replace('...', ''))

1508 uncert = float(line[77:99].replace(' ', '').replace('(exact)', '0'))

1509 units = line[99:].rstrip()

1510 constants[name] = (val, units, uncert)

1511 return constants

1512

1513

1514def parse_constants_2018toXXXX(d: str) -> dict[str, tuple[float, str, float]]:

1515 constants = {}

1516 for line in d.split('\n'):

1517 name = line[:60].rstrip()

1518 val = float(line[60:85].replace(' ', '').replace('...', ''))

1519 uncert = float(line[85:110].replace(' ', '').replace('(exact)', '0'))

1520 units = line[110:].rstrip()

1521 constants[name] = (val, units, uncert)

1522 return constants

1523

1524

1525_physical_constants_2002 = parse_constants_2002to2014(txt2002)

1526_physical_constants_2006 = parse_constants_2002to2014(txt2006)

1527_physical_constants_2010 = parse_constants_2002to2014(txt2010)

1528_physical_constants_2014 = parse_constants_2002to2014(txt2014)

1529_physical_constants_2018 = parse_constants_2018toXXXX(txt2018)

1530

1531

1532physical_constants.update(_physical_constants_2002)

1533physical_constants.update(_physical_constants_2006)

1534physical_constants.update(_physical_constants_2010)

1535physical_constants.update(_physical_constants_2014)

1536physical_constants.update(_physical_constants_2018)

1537_current_constants = _physical_constants_2018

1538_current_codata = "CODATA 2018"

1539

1540# check obsolete values

1541_obsolete_constants = {}

1542for k in physical_constants:

1543 if k not in _current_constants:

1544 _obsolete_constants[k] = True

1545

1546# generate some additional aliases

1547_aliases = {}

1548for k in _physical_constants_2002:

1549 if 'magn.' in k:

1550 _aliases[k] = k.replace('magn.', 'mag.')

1551for k in _physical_constants_2006:

1552 if 'momentum' in k:

1553 _aliases[k] = k.replace('momentum', 'mom.um')

1554for k in _physical_constants_2018:

1555 if 'momentum' in k:

1556 _aliases[k] = k.replace('momentum', 'mom.um')

1557

1558# CODATA 2018: renamed and no longer exact; use as aliases

1559_aliases['mag. constant'] = 'vacuum mag. permeability'

1560_aliases['electric constant'] = 'vacuum electric permittivity'

1561

1562

1563class ConstantWarning(DeprecationWarning):

1564 """Accessing a constant no longer in current CODATA data set"""

1565 pass

1566

1567

1568def _check_obsolete(key: str) -> None:

1569 if key in _obsolete_constants and key not in _aliases:

1570 warnings.warn("Constant '{}' is not in current {} data set".format(

1571 key, _current_codata), ConstantWarning)

1572

1573

1574def value(key: str) -> float:

1575 """

1576 Value in physical_constants indexed by key

1577

1578 Parameters

1579 ----------

1580 key : Python string

1581 Key in dictionary `physical_constants`

1582

1583 Returns

1584 -------

1585 value : float

1586 Value in `physical_constants` corresponding to `key`

1587

1588 Examples

1589 --------

1590 >>> from scipy import constants

1591 >>> constants.value('elementary charge')

1592 1.602176634e-19

1593

1594 """

1595 _check_obsolete(key)

1596 return physical_constants[key][0]

1597

1598

1599def unit(key: str) -> str:

1600 """

1601 Unit in physical_constants indexed by key

1602

1603 Parameters

1604 ----------

1605 key : Python string

1606 Key in dictionary `physical_constants`

1607

1608 Returns

1609 -------

1610 unit : Python string

1611 Unit in `physical_constants` corresponding to `key`

1612

1613 Examples

1614 --------

1615 >>> from scipy import constants

1616 >>> constants.unit('proton mass')

1617 'kg'

1618

1619 """

1620 _check_obsolete(key)

1621 return physical_constants[key][1]

1622

1623

1624def precision(key: str) -> float:

1625 """

1626 Relative precision in physical_constants indexed by key

1627

1628 Parameters

1629 ----------

1630 key : Python string

1631 Key in dictionary `physical_constants`

1632

1633 Returns

1634 -------

1635 prec : float

1636 Relative precision in `physical_constants` corresponding to `key`

1637

1638 Examples

1639 --------

1640 >>> from scipy import constants

1641 >>> constants.precision('proton mass')

1642 5.1e-37

1643

1644 """

1645 _check_obsolete(key)

1646 return physical_constants[key][2] / physical_constants[key][0]

1647

1648

1649def find(sub: str | None = None, disp: bool = False) -> Any:

1650 """

1651 Return list of physical_constant keys containing a given string.

1652

1653 Parameters

1654 ----------

1655 sub : str

1656 Sub-string to search keys for. By default, return all keys.

1657 disp : bool

1658 If True, print the keys that are found and return None.

1659 Otherwise, return the list of keys without printing anything.

1660

1661 Returns

1662 -------

1663 keys : list or None

1664 If `disp` is False, the list of keys is returned.

1665 Otherwise, None is returned.

1666

1667 Examples

1668 --------

1669 >>> from scipy.constants import find, physical_constants

1670

1671 Which keys in the ``physical_constants`` dictionary contain 'boltzmann'?

1672

1673 >>> find('boltzmann')

1674 ['Boltzmann constant',

1675 'Boltzmann constant in Hz/K',

1676 'Boltzmann constant in eV/K',

1677 'Boltzmann constant in inverse meter per kelvin',

1678 'Stefan-Boltzmann constant']

1679

1680 Get the constant called 'Boltzmann constant in Hz/K':

1681

1682 >>> physical_constants['Boltzmann constant in Hz/K']

1683 (20836619120.0, 'Hz K^-1', 0.0)

1684

1685 Find constants with 'radius' in the key:

1686

1687 >>> find('radius')

1688 ['Bohr radius',

1689 'classical electron radius',

1690 'deuteron rms charge radius',

1691 'proton rms charge radius']

1692 >>> physical_constants['classical electron radius']

1693 (2.8179403262e-15, 'm', 1.3e-24)

1694

1695 """

1696 if sub is None:

1697 result = list(_current_constants.keys())

1698 else:

1699 result = [key for key in _current_constants

1700 if sub.lower() in key.lower()]

1701

1702 result.sort()

1703 if disp:

1704 for key in result:

1705 print(key)

1706 return

1707 else:

1708 return result

1709

1710

1711c = value('speed of light in vacuum')

1712mu0 = value('vacuum mag. permeability')

1713epsilon0 = value('vacuum electric permittivity')

1714

1715# Table is lacking some digits for exact values: calculate from definition

1716exact_values = {

1717 'joule-kilogram relationship': (1 / (c * c), 'kg', 0.0),

1718 'kilogram-joule relationship': (c * c, 'J', 0.0),

1719 'hertz-inverse meter relationship': (1 / c, 'm^-1', 0.0),

1720}

1721

1722# sanity check

1723for key in exact_values:

1724 val = physical_constants[key][0]

1725 if abs(exact_values[key][0] - val) / val > 1e-9:

1726 raise ValueError("Constants.codata: exact values too far off.")

1727 if exact_values[key][2] == 0 and physical_constants[key][2] != 0:

1728 raise ValueError("Constants.codata: value not exact")

1729

1730physical_constants.update(exact_values)

1731

1732_tested_keys = ['natural unit of velocity',

1733 'natural unit of action',

1734 'natural unit of action in eV s',

1735 'natural unit of mass',

1736 'natural unit of energy',

1737 'natural unit of energy in MeV',

1738 'natural unit of mom.um',

1739 'natural unit of mom.um in MeV/c',

1740 'natural unit of length',

1741 'natural unit of time']

1742

1743# finally, insert aliases for values

1744for k, v in list(_aliases.items()):

1745 if v in _current_constants or v in _tested_keys:

1746 physical_constants[k] = physical_constants[v]

1747 else:

1748 del _aliases[k]

Coverage for /usr/lib/python3/dist-packages/scipy/constants/_codata.py: 84%

97 statements