5.17 (a) Suppose the Hamiltonian of a rigid rotator in a magnetic field perpendicular to the axis is of the form (Merzb...
5.17 (a) Suppose the Hamiltonian of a rigid rotator in a magnetic field perpendicular to the axis is of the form (Merzbacher 1970, Problem 17-1) AL2+BL+CLy if terms quadratic in the field are neglected. Assuming BC, use perturbation theory to lowest nonvanishing order to get approximate energy eigenvalues. (b) Consider the matrix elements of a one-electron (for example, alkali) atom, write the selection rules for Δ Ami, and Ams. Justify your answer