Energies and Auger widths of the high-lying triply excited states for Li-like beryllium

Abstract

The energies, fine-structure splittings, Auger channel energies, and the Auger widths of the high-lying triply excited 2l2l{sup '}nl{sup ''} (n>=2) states of {sup 2}S, {sup 2}D, and {sup 2}P{sup o} resonances for Be{sup +} are studied using the saddle-point variational method and saddle-point complex-rotation method. The relativistic corrections and mass polarization are included using the first-order perturbation theory. Restricted variational method is carried out to extrapolate better energies. The partial Auger widths are calculated for the individual open channels and the total Auger widths are obtained by coupling the important open channels and summing over the other channels. The configuration mixings of the triply excited resonances are described and differences in the literature on the designation of the intershell states are pointed out. These results are compared with other theoretical and experimental data in the literature.