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Phys. Rev. A 71, 032713 (2005) [5 pages]

Positronium formation in positron-Li and positron-Na collisions at low energies

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Anh-Thu Le *, M. W. J. Bromley †, and C. D. Lin
Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506, USA

Received 21 September 2004; revised 4 January 2005; published 18 March 2005

We present the positronium formation cross sections for a positron colliding with lithium and sodium for the collision energies from 0.01  eV up to 20  eV by the hyperspherical close-coupling method. For Li, our results agree with the experimental data and with other calculations. Our results for Na remain in agreement with previous close-coupling calculations, but do not support the latest experimental data for Na below 1  eV . To validate our model potentials and method in the low-energy regime, the binding energies of positronic lithium and positronic sodium as well as the s -wave scattering lengths for positronium scattering from Li+ and Na+ are also presented.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.71.032713
DOI: 10.1103/PhysRevA.71.032713
PACS: 34.85.+x, 36.10.Dr, 34.70.+e, 31.15.Ja

* Electronic address: atle@phys.ksu.edu
† Faculty of Technology, Charles Darwin University, Darwin, NT 0909, Australia.

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