(1) Department of Mathematics, Chemical Faculty, Slovak Technical University, Jánska 1, 88037 Bratislava, Czechoslovakia;(2) Department of Physical Chemistry, The Comenius University, Mlynská Dolina, 81631 Bratislava, Czechoslovakia
Abstract:
The vertical ionization potentials of H2O and Ne are calculated by many-body Rayleigh-Schrödinger perturbation theory up to third order. The comparison of the present method with the other approaches is done.