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Positron and positronium binding to atoms

Mitroy, Jim, Bromley, Michael W. J. and Ryzhikh, G. G. (2002). Positron and positronium binding to atoms. Journal of Physics B: Atomic, Molecular and Optical Physics,35(13):81-116.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 110 times in Scopus Article | Citations

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Title Positron and positronium binding to atoms
Author Mitroy, Jim
Bromley, Michael W. J.
Ryzhikh, G. G.
Journal Name Journal of Physics B: Atomic, Molecular and Optical Physics
Publication Date 2002
Volume Number 35
Issue Number 13
ISSN 0953-4075   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0037077351
Start Page 81
End Page 116
Total Pages 36
Place of Publication Bristol, England
Publisher IOP Publishing
Field of Research 0202 - Atomic, Molecular, Nuclear, Particle and Plasma Physics
0205 - Optical Physics
HERDC Category C1 - Journal Article (DEST)
Abstract Recent research has shown that there are a number of atoms and atomic ions that can bind a positron. The number of atoms known to be capable of binding a positron has expanded enormously in recent years, with Li, He(S-3(e)), Be, Na, Mg, Ca; Cu, Zn, Sr, Ag and Cd all capable of binding a positron. The structure of these systems is largely determined by the competition between the positron and the nucleus to bind the loosely bound valence electrons. Some systems, such as e(+)Li and e(+)Na, can be best described as a Ps cluster orbiting a charged Li+ or Na+ core, while others such as e(+)Be consist of a positron orbiting a polarized Be atom. In addition, a number of atoms (Li, C, O, F, Na, Cl, K, Cl, Cu, Br) can bind positronium and a few systems capable of binding two positrons have also been identified. These positron-binding systems decay by electron-positron annihilation with the annihilation rate for e(+)A-systems largely determined by the parent atom ionization potential.
Keywords quantum monte-carlo
many-body calculations
polarized orbital approximation
correlated gaussian functions
stochastic variational method
alkaline-earth atoms
ground-state energy
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