Time-Independent Perturbation Theory — David J. Griffiths
Physics — Quantum Mechanics · hyperfine_deuterium
Problem
Calculate the wavelength, in centimeters, of the photon emitted under a hyperfine transition in the ground state (n=1) of deuterium. Deuterium is "heavy" hydrogen, with an extra neutron in the nucleus; the proton and neutron bind together to form a deuteron, with spin 1 and magnetic moment
μd=2mdgdeSd;
the deuteron g-factor is 1.71.