Variational perturbation theory investigations on two-electron atomic systems. III. Nonrelativistic results for the state 1<i>s</i> 2<i>s</i> 3<i>S</i>

Abstract

The variational perturbation (HSK) procedure has been applied to the two-electron atomic state 1s2s3S. The total nonrelativistic energies and corresponding wavefunctions have been determined with errors less than one part in 1012 and 1–2 parts in 106, respectively, for all Z ≥ 2. The results are presented in tables accompanied by illustrative figures.