Determination of resonance energies and widths of Mg 3pn 1De and 1Fo doubly excited states by the stabilization method with the B-spline-based configuration interaction approach

Abstract

The resonance energies and widths of Mg 3pn 1De and 1Fo doubly excited states are determined by calculating the density of resonance states using the stabilization method with the B-spline-based configuration interaction (BSCI) approach. The effects due to the intrashell core excitation and intershell core-valence interactions are taken into account in the BSCI calculation by using a parametrized long-range core-polarization potential. Comparisons are made with the existing theoretical and experimental results.