Differential correlation effects for states of the 3dnand 3dn4smconfigurations. II. A complete study of the energy splittings for the nickel atom

Abstract

For pt.I, see ibid., vol.18, p.2133-46 (1985). The approximate ab initio approach for the evaluation of electron correlation effects on atomic energy differences, formulated in part I, (1985), has been applied to a complete study of the splittings of the energies corresponding to the 3d10-m4sm (m=0, 1, 2) configurations of the Ni atom. The results are modified to take into account the leading relativistic corrections. If both non-dynamical and all-external correlation effects are accounted for, good agreement with experiment is found. The analysis of the impact of various types of correlation effects further confirmed the findings of part I.