Electron Bohr magneton

If the external magnetic field B(r), and m(r) have only a nonvanishing Z-component, B(r) = (0,0, B(r)) and m(r) = (0,0, m(r)), the universal functional F[p, m] may then be considered as a functional of the spin densities ps(r) and p(r), F[ps(r), p(r)], because the spin density is proportional to the z-component of the magnetization m(r) = p-bPsW P-b is the electron Bohr magneton. It is of worth mentioning that it is possible to define two spin densities that are the diagonal elements of the density matrix introduced by von Barth and Hedin [3]. These correspond to the spin-up (alpha) electrons density pT(r), and the spin-down (beta) electrons density p (r). In terms of these quantities, the electron and spin densities can be written as... 

The g-value of the methyl radical whose centre of ESR spectrum appears at 329.4 mT in a spectrometer operating at 9-233 G. Hz (h = 6-627 x 1034 Js, electron Bohr Magneton = 9-27 X 1024 JTl) is. The number of lines in the ESR spectrum of this methyl radical predicated ... 

The last step is to substitute the electron Bohr magneton for eh 12m, and to make the replacement... 

Hb = electron Bohr magneton = eh/2m fXN = nuclear Bohr magneton = eh/2MP c= speed of light... 

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