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Relativistic many-body calculations of energies for doubly-excited 1s2l2l′ and 1s3l3l′ states in Li-like ions
- Source :
- Canadian Journal of Physics. 82:743-764
- Publication Year :
- 2004
- Publisher :
- Canadian Science Publishing, 2004.
-
Abstract
- Energies of 1s2l2l′ and 1s3l3l′ states for Li-like ions with Z = 6100 are evaluated to second order in relativistic many-body perturbation theory. Second-order Coulomb and BreitCoulomb interactions are included. The calculations start with a Dirac potential and include all possible 1s2l2l′ and 1s3l3l′ configurations. Correction for the frequency dependence of the Breit interaction is taken into account in lowest order. The Lamb-shift correction to the energies is also included in lowest order. A detailed discussion of the various contributions to the energy levels is given for Li-like iron (Z = 26). We found that the three-electron corrections to the energy contribute about 1020% of the total second-order energy. Comparisons are made with available experimental data and excellent agreement for term splitting is obtained even for low-Z ions. These calculations are presented as a theoretical benchmark for comparison with experiment and theory.PACS Nos.: 32.30.Rj, 32.70.Cs, 31.25.Jf, 31.15.Md
Details
- ISSN :
- 12086045 and 00084204
- Volume :
- 82
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Physics
- Accession number :
- edsair.doi...........b210ebad24dc49b1d8f88558185200a4
- Full Text :
- https://doi.org/10.1139/p04-041