Calculation of Energy Levels Which Arise from thep2Configuration of the Ground State of Carbon. Multiconfiguration Hartree-Fock Calculations

Abstract

A calculation of the term splitting $\frac{({}_{}{}^3{}_{}{}^{}P-{}_{}{}^1{}_{}{}^{}D)}{({}_{}{}^1{}_{}{}^{}D-{}_{}{}^1{}_{}{}^{}S)}$ for the $p^2$ ground-state configuration of carbon using Hartree-Fock radial orbitals gives an error of 21% when compared with experiment. Multiconfiguration Hartree-Fock calculations where the excitations are confined to the $2p^2$ shell reduces the error to slightly more than 1%.