a) g = (hbar*gamma)/µ_N
gamma, the gyromagnetic ratio = -5.692*10^7 rad*T^-1*s^-1
µ_N = µ/(I*hbar)
ground state: I = 1/2, mu = -0.595
=> g = 2.157*10^-23
245 keV: I=5/2, mu = -0.766
=> g = 8.049*10^-23
b) µ_S = g_e *(µ_B/hbar)*S
S = 1/2, µ_S=µ_B => g_e = S/hbar = 1/(2*hbar)
c) µ_N = (hbar*gamma)/g = 3.15*10^-8 eV/T
gamma, the gyromagnetic ratio = -1.832*10^8 rad*s^-1*T^-1