Phys. Rev. A 71, 032713 (2005) [5 pages]Positronium formation in positron-Li and positron-Na collisions at low energiesReceived 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
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