Evaluation of the specific mass shift and field shift in the alkaline-earth Sr atom

Abstract

Vinti's expression for the Specific mass shift, determined as a sum over Slater integrals, has been used in a first-order perturbation treatment of alkaline-earth atoms. The Specific mass shift and Field shift have been evaluated for a number of transitions in the Sr atom. Mixing of the main configuration with one or two excited configurations has been taken into account in the levels involved in some of the transitions. The orbitals were generated in a potential, with adjustable radial scaling parameters, represented by an analytic expression with an infinite radius of convergence. The present results are compared, where possible, with results of other theoretical calculations and with experimental data.