An electron spin can adopt either of two orientations in a magnetic field, and its
Chapter 16, Problem 16.7(a)(choose chapter or problem)
An electron spin can adopt either of two orientations in a magnetic field, and its energies are BB, where B is the Bohr magneton. Deduce an expression for the partition function and mean energy of the electron and sketch the variation of the functions with B. Calculate the relative populations of the spin states at (a) 4.0 K, (b) 298 K when B = 1.0 T.
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