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The stability of the ground state for positronic sodium

Ryzhikh, G. G., Mitroy, Jim and Varga, Kalman (1998). The stability of the ground state for positronic sodium. Journal of Physics B: Atomic, Molecular and Optical Physics,31(6):265-271.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 45 times in Scopus Article | Citations

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Title The stability of the ground state for positronic sodium
Author Ryzhikh, G. G.
Mitroy, Jim
Varga, Kalman
Journal Name Journal of Physics B: Atomic, Molecular and Optical Physics
Publication Date 1998
Volume Number 31
Issue Number 6
ISSN 0953-4075   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0032027922
Start Page 265
End Page 271
Total Pages 1
Place of Publication Bristol, Uk
Publisher IOP Publishing
HERDC Category C4 - Journal Article - Letter or Note (internal)
Abstract The existence of a stable ground state for the exotic NaeC atom is demonstrated by using a modified version of the stochastic variational method to solve the Schr¨odinger equation for a positron and valence electron moving under the influence of a model potential. The model potential consists of the direct interaction between the positronium and the Hartree–Fock wavefunction for the alkali ion. The exchange potential between the valence electron and the core electrons is approximated with a local potential. The structure of positronic sodium is best described as a slightly stretched and polarized positronium atom orbiting the NaC core at distances of the order of 10–30 a0. It is found that positronic sodium is stable against decay into Ps C NaC with a binding energy of 0.000 177 Hartree.
DOI http://dx.doi.org/10.1088/0953-4075/31/6/003   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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