Sec. 23.4] 



SYNCHROTRON 



499 



REFERENCES FOR CHAP. 23 



1. McMillan, E. M.: Phys. Rev., 68, 143 (1945). 



2. Veksler, V.: /. Phys. (U.S.S.R.), 9, 153 (1945). 



3. Bohm, D., and L. Foldy: Phys. Rev., 70, 249 (1946). 



4. Frank, N. H.: Phys. Rev., 70, 177 (1946). 



5. Kerst, D. W., and R. Serber: Phys. Rev., 60, 53 (1941). 



Table 45. Physical Constants 

 The following is a partial list of the physical constants reported by R. T. Birge, Rev. 

 Mod. Phys., 13, 283 (1941). 

 Atomic weight of electron: 



1. Physical scale A, 



2. Chemical scale A e 

 Avogadro number N 

 Bohr magneton fj. 

 Bohr radius R 

 Boltzman constant k 

 Classical electronic radius R e 

 Compton shift at 90° h/m c 

 Density of Hg (0°C, standard at- d 



mosphere) 

 Electronic charge e 



Electronic mass m 



Faraday constant: 



1. Chemical scale F 



a 



Ro 



g 



Mh 



L 



2. Physical scale 



Fine structure constant 

 Gas constant 

 Gravitational constant 

 Hydrogen atom mass 

 Loschmidt number (0°C, standard 



atmosphere) 

 Mass of unit atomic weight (l/N ) M 

 Maximum density of water d m &x 



Planck constant h 



Proton mass M p 



Ratio physical to chemical atomic r 



weight scales 

 Ratio proton mass to electronic 



mass 

 Rest energy of electron mc 2 



Specific electronic charge e/m 



Standard atmosphere A 



Velocity of light c 



= (5.4862 ± 0.0017) X 10~ 4 



= (5.4847 ± 0.0017) X 10" 4 



= (6.0228 ± 0.0011) X 10 23 per mole 



= (0.9273 ± 0.0003) X lO" 20 erg/gauss 



= 0.53 X 10- 8 cm 



= (1.38047 ± 0.00026) X 10" 16 erg/deg 



= 2.807 X 10" 13 cm 



= (0.024265 ± 0.000005) X 10" 8 cm 



= 13.59504 ± 0.00005 gm/cm 3 



= (1.60203 + 0.00034) X lO" 20 abs emu 

 = (4.8025 ± 0.0010) X 10" 10 abs esu 

 = (9.1066 ± 0.0032) X 10" 28 gm 



= 96,501 + 10 int coulomb/gm-equiv 



= 96,487 + 10 abs coulomb/gm-equiv 



= 9,648.7 ± 1. abs emu/gm-equiv 



= 96,514 ± 10 abs coulomb/gm-equiv 



= 9,651.4 + 1.0 abs emu/gm-equiv 



= (7.2976 ± 0.0008) X 10~ 3 



= (8.31436 + 0.00038) X 10 7 erg/deg/mole 



= (6.670 + 0.005) X 10- 8 dyne cm 2 /gm 2 



= (1.67339 ± 0.00031) X 10~ 24 gm 



= (2.6870 ± 0.0005) X 10 19 per atmos/cm 3 



= (1.66035 ± 0.00031) X 10~ 24 gm 

 = 0.999972 + 0.000002 gm/cm 3 

 = (6.624 ± 0.002) X 10~ 27 erg/sec 



= (1.67248 + 0.00031) X 

 = 1.000272 + 0.000005 



M P /m = 1836.5 ± 0.5 



10- 



gm 



= 0.5107 mev 



= (1.7592 ± 0.0005) X 10 7 abs emu/gm 



= (5.2736 ± 0.0015) X Id 7 abs esu/gm 



= (1.013246 ± 0.000004) X 10 6 dyne/cm 2 /atm. 



= (2.99776 + 0.00004) X 10 10 cm/sec 



