Fine structure of negative ions of alkaline-earth-metal atoms

V. A. Dzuba*, V. V. Flambaum, G. F. Gribakin, D. P. Sushkov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


Fine-structure intervals np1/2-np3/2 (np1/2 is the ground state) are calculated for negative ions using relativistic many-body perturbation theory: Ca- 4p, 56 cm-1; Sr- 5p, 178 cm-1; Ba- 6p, about 460 cm-1; and Ra- 7p, 1341 cm-1. Comparison of the fine-structure interval with affinity: Ca- 10%, Sr- 22%, Ba- 30%; for Ra- the fine-structure interval is larger than the affinity. Thus the Ra- 7p3/2 state is a resonance in the continuous spectrum with energy 0.018 eV. This means that the relativistic spin-orbit interaction plays a determining role in slow electron-radium scattering.

Original languageEnglish
Pages (from-to)2823-2827
Number of pages5
JournalPhysical Review A
Issue number5
Publication statusPublished - 01 Sept 1991
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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