Appendix III: Some Useful Constants

(J.W.M. DuMond and E.R. Cohen, Least Squares Adjustment of the Atomic Constants, 1952. Rev. Mod. Phys. 25, 691, 1953.)

Avogadro's Number - N = 6.025 x 10²³ molecules per gram-mole

Planck's Constant - h = 6.625 x 10^-27 erg-seconds

Velocity of light - c = 2.998 x 10¹⁰ cm per second

Quantum energy times wave length - h x v = 12.40 KeV A.

Electron Charge - e = 4.803 x 10^-10 esu of charge - 1.6 x 10^-19 coulomb

One Mass Unit - mu = 1.6598 x 10^-24 grams

Energy Equivalent of one Mass Unit - 1.492 x 10^-3 ergs, = 931.16 MeV

Electron Rest Mass - m_o = 9.108 x 10^-28 gm
= 0.000549 mu
= 0.51098 MeV

Proton Rest Mass - M_o = 1.6724 x 10^-24 gm
= 1.00759 mu
= 938.23 MeV

Neutron Rest Mass - Mn = 1.6747 x 10^-24 gm
= 1.00898 mu
= 939.53 MeV

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