Perturbation theory for short-range atomic interactions. I. Numerical results

Abstract

Perturbation theory of the electron correlation cusp based on a partitioning of the electron-electron interaction into long-and short-range components Numerical results for various perturbation series for atomic interactions at short range are presented for the energy, dipole moment, and dipole polarizahility of one-electron diatomics. Although third-order energy results are accurate at short range, there is appreciable error in the other property values. The convergence of the series is considered in a companion paper.