Combined configuration-interaction and many-body-perturbation-theory calculations of energy levels and transition amplitudes in Be, Mg, Ca, and Sr
Abstract
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.
- Publication:
-
Physical Review A
- Pub Date:
- April 2002
- DOI:
- 10.1103/PhysRevA.65.042503
- arXiv:
- arXiv:physics/0111008
- Bibcode:
- 2002PhRvA..65d2503S
- Keywords:
-
- 31.10.+z;
- 31.25.-v;
- 32.30.-r;
- 32.70.-n;
- Theory of electronic structure electronic transitions and chemical binding;
- Electron correlation calculations for atoms and molecules;
- Atomic spectra;
- Intensities and shapes of atomic spectral lines;
- Physics - Atomic Physics
- E-Print:
- Phys. Rev. A 65, 042503, 1-7 (2002)