Abstract
The diagonal 2ph-TDA and quasiparticle decouplings of the dilated electron propagator (based on an underlying bi-variational SCF) are utilized to calculate energy and width of the Be+(1s −1)2S Auger resonance for the first time. Comparison with experimental and other theoretical results reveals that the renormalized infinite order diagonal 2ph-TDA decoupling seems to offer a less balanced approach to the treatment of resonances than the second-order decoupling. The diagonal quasiparticle approximation to the self energy is seen to offer an effective and economic alternative to the non-diagonal propagator calculations.
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Medikeri, M.N., Mishra, M.K. Treatment of Be+ (1 s − 1)2S Auger resonance with different decouplings of the dilated electron propagator. Proc. Indian Acad. Sci. (Chem. Sci.) 106, 111–121 (1994). https://doi.org/10.1007/BF02840735
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DOI: https://doi.org/10.1007/BF02840735