A study of Fermi hole for closed and open shell systems

Abstract

The electron correlation effect for the inter-electronic shell can be described by evaluating the Fermi hole for Li-atom and comparing with Be+ -,and B2+ - ions(Li-like ions)also the inter-particle distribution function due to the Fermi hole be described by evaluating the change which occurs un the two-particle radial distribution function , between the inter-shell KL -shell using Hartree-Fock(HF) wave function, and by evaluating the Fermi hole change which occurs in two-particle radial distribution function , between the CI and HF wave function approximations.