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

V. A. Dzuba; V. V. Flambaum; G. F. Gribakin; D. P. Sushkov

doi:10.1103/PhysRevA.44.2823

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 journal › Article

41 Citations (Scopus)

Abstract

Fine-structure intervals np_1/2-np_3/2 (np_1/2 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^- 7p^3/2 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 language	English
Pages (from-to)	2823-2827
Number of pages	5
Journal	Physical Review A
Volume	44
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.44.2823
Publication status	Published - 01 Sep 1991
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.44.2823

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title = "Fine structure of negative ions of alkaline-earth-metal atoms",

abstract = "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.",

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AU - Dzuba, V. A.

AU - Flambaum, V. V.

AU - Gribakin, G. F.

AU - Sushkov, D. P.

PY - 1991/9/1

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N2 - 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.

AB - 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.

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