Determination of resonance energies and widths of the Mg P-1(0) doubly excited states by the stabilization method with the B-spline-based configuration interaction approach

The resonance energies and widths of the Mg 3pns and 3pnd P-1(o) doubly exc ited states are determined by calculating the density of resonance states u sing the stabilization method with the B-spline-based configuration interac tion (BSCI) approach. The effects due to the intrashell core excitation and intershell core-valence interactions are taken into account in the BSCI ca lculation by using a parametrized long-range core-polarization potential. O ur results are in good agreement with the existing theoretical and experime ntal results.