Low-energy positron interactions with xenon

J. R. Machacek, C. Makochekanwa, A. C.L. Jones, P. Caradonna, D. S. Slaughter, R. P. McEachran, J. P. Sullivan, S. J. Buckman*, S. Bellm, B. Lohmann, D. V. Fursa, I. Bray, D. W. Mueller, A. D. Stauffer

*Corresponding author for this work

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    Abstract

    Low-energy interactions of positrons with xenon have been studied both experimentally and theoretically. The experimental measurements were carried out using a trap-based positron beam with an energy resolution of ̃80 meV, while the theoretical calculations were carried out using the convergent close-coupling method and the relativistic optical potential approach. Absolute values of the grand total, positronium formation and grand total minus positronium formation cross sections are presented over the energy range of 1-60 eV. Elastic differential cross sections (DCS), for selected energies, are also presented both below and above the positronium formation threshold. Fine energy-step measurements of the positronium formation cross section over the energy range of 4.4-8.4 eV, and measurements of the elastic DCS at the energies of 5.33 and 6.64 eV, have been carried out to investigate the ionization threshold.

    Original languageEnglish
    Article number125004
    JournalNew Journal of Physics
    Volume13
    DOIs
    Publication statusPublished - Dec 2011

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