Experimental determination of the scattering length for positron scattering from krypton

Antonio Zecca, Luca Chiari, E Trainotti, D Fursa, I Bray, Michael Brunger

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    34 Citations (Scopus)

    Abstract

    We report the first experimentally supported determination of the scattering length for positron scattering from krypton. Our result of -10.3 ± 1.5 a.u. compares favourably with that from a convergent close coupling calculation performed as a part of this investigation (-9.5 a.u.), and also with an earlier many body theory calculation of -10.1 a.u. from Gribakin and Ludlow [Phys. Rev. A 70, 032720 (2004)] and a polarized-orbital result of -10.4 a.u. from McEachran et al. [J. Phys. B 13, 1281 (1980)]. The present experimental scattering length supports the existence of a low-lying positron-krypton virtual state (Surko et al. [J. Phys. B 38, R57 (2005)]) at an energy ε = 0.13 eV.

    Original languageEnglish
    Pages (from-to)317-321
    Number of pages5
    JournalThe European Physical Journal D
    Volume64
    Issue number2-3
    DOIs
    Publication statusPublished - Oct 2011

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