Energies and widths of electron scattering and Auger resonances of atomic beryllium

Abstract

The present calculation is the first application of a Green's-function approach to resonance states based upon the direct use of Siegert boundary conditions. Consequently, the emphasis is on methodological aspects rather than the description of a great number of resonances. Of particular interest is the treatment of inner-shell vacancies and their satellites as resonance states. We have evaluated the energies and widths of one electron scattering resonance and three Auger-type resonances all of $^{2}S$ symmetry.