Phys. Rev. A 77, 012721 (2008) [8 pages]S-wave resonances in positron-sodium scatteringReceived 24 July 2007; published 29 January 2008 We have calculated S-wave resonances in the positron-sodium system using the stabilization method in the framework of hyperspherical coordinates. Resonances below the Ps(n=2) threshold have been investigated. We have located all the previously known S-wave resonances by Kar and Ho Eur. Phys. J. D 35 453 (2005) and Ward et al. J. Phys. B 22 3763 (1989) and observed relatively good agreement for the resonance positions. In addition, two new higher-lying resonances associated with the Ps(n=2) threshold are found to be at energies of −0.066 56 and −0.063 53 a.u. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.77.012721
DOI:
10.1103/PhysRevA.77.012721
PACS:
34.80.Uv, 31.15.xj, 33.40.+f
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