J Mitroy et al 2002 J. Phys. B: At. Mol. Opt. Phys. 35 R81 doi:10.1088/0953-4075/35/13/201
Positron and positronium binding to atoms
REVIEW ARTICLEJ Mitroy, M W J Bromley and G G Ryzhikh
Show affiliationsTOPICAL REVIEW
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(3Se), 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.
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Issue 13 (14 July 2002)
Received 15 January 2002, in final form 16 May 2002
Published 25 June 2002
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Positron and positronium binding to atoms
J Mitroy et al 2002 J. Phys. B: At. Mol. Opt. Phys. 35 R81
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