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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2015 Sep 7|
|Event||29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015 - Toledo, Spain|
Duration: 2015 Jul 22 → 2015 Jul 28
ASJC Scopus subject areas
- Physics and Astronomy(all)