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Positron binding to a model alkali atom

Mitroy, Jim, Bromley, Michael W. J. and Ryzhikh, G. G. (1999). Positron binding to a model alkali atom. Journal of Physics B: Atomic, Molecular and Optical Physics,32(9):2203-2214.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 37 times in Scopus Article | Citations

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Title Positron binding to a model alkali atom
Author Mitroy, Jim
Bromley, Michael W. J.
Ryzhikh, G. G.
Journal Name Journal of Physics B: Atomic, Molecular and Optical Physics
Publication Date 1999
Volume Number 32
Issue Number 9
ISSN 0953 4075   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0032653877
Start Page 2203
End Page 2214
Total Pages 12
Place of Publication Bristol, UK
Publisher IOP Publishing
HERDC Category C1 - Journal Article (DEST)
Abstract The fixed core stochastic variational method is used to investigate positron binding to a model alkali atom with a continuously adjustable ionization potential. Positron binding is possible for model atoms which have ionization potential (IP) ranging from 0.1767 to 0.479 Hartree (corresponding to dipole polarizabilities ranging from 209 to 23.5 a03). Results of the model indicate that positron binding is likely for gold, but not for potassium, rubidium or caesium. The annihilation rate was largest (1.97 × 109 s-1) when the IP is smallest and smallest (0.07 × 109 s-1) when the IP is largest. The presence of a positronium (Ps) cluster configuration in the wavefunction is found to be important for an accurate estimate of the annihilation rate even in circumstances when the positron and electron are located large distances apart.
DOI http://dx.doi.org/10.1088/0953-4075/32/9/311   (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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