Self-Consistent Calculation of Dynamic Polarizability

Abstract

The dynamic polarizability of hydrogen and helium have been calculated by considering the effect of an external electromagnetic radiation on an atom through time-dependent perturbation procedure. Self-consistent solutions have been obtained in the Hartree—Fock scheme. The coupling of the perturbed functions through the self-consistency procedure markedly alters the relative contribution of the different terms to the total polarizability. The method developed is quite general and equally applicable to atoms and molecules. Studies of the variation of polarizability with frequency of the radiation reveals certain limitations of the perturbation treatment and also of Koopman's theorem.