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arxiv: physics/0111008 · v1 · submitted 2001-11-03 · ⚛️ physics.atom-ph

Combined CI+MBPT calculations of energy levels and transition amplitudes in Be, Mg, Ca, and Sr

classification ⚛️ physics.atom-ph
keywords mbptamplitudescalculationsenergylevelstheorytransitionapplied
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Configuration interaction (CI) calculations in atoms with two valence electrons, carried out in the V(N-2) Hartree-Fock potential of the core, are corrected for core-valence interactions using many-body perturbation theory (MBPT). Two variants of the mixed CI+MBPT theory are described and applied to obtain energy levels and transition amplitudes for Be, Mg, Ca, and Sr.

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