Relativistic effects in positronic alkali atoms

Synopsis In order to investigate interactions between a positron positronium and an atom ion, we calculate positronic alkali atoms, a loosely bound state of an alkali ion and a positronium, as a three-body system composed of the positron, valence electron and residual ion core within a frozen core a...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-09, Vol.635 (5), p.52086
Main Authors: Yamashita, Takuma, Kino, Yasushi
Format: Article
Language:English
Subjects:
Energy levels
Fine structure
Metal ions
Physics
Positronium
Relativistic effects
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Summary:Synopsis In order to investigate interactions between a positron positronium and an atom ion, we calculate positronic alkali atoms, a loosely bound state of an alkali ion and a positronium, as a three-body system composed of the positron, valence electron and residual ion core within a frozen core approximation. We optimize model potentials to reproduce energy levels and fine structure splittings of alkali atoms. The ion core polarization by a positron is determined more precisely than other previous studies. We found that the relativistic effects amazingly contribute to the binding energy of the positronic alkali atom. We also discuss the rearrangement effect on the relativistic corrections and roles of positronium-ion and atom-positron configurations.
ISSN:1742-6588
1742-6596
1742-6596
DOI:10.1088/1742-6596/635/5/052086