The European Physical Journal D

, Volume 64, Issue 2–3, pp 317–321 | Cite as

Experimental determination of the scattering length for positron scattering from krypton

  • A. Zecca
  • L. Chiari
  • E. Trainotti
  • D. V. Fursa
  • I. Bray
  • M. J. Brunger
Regular Article Atomic and Molecular Collisions

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.

Keywords

Krypton Elastic Cross Section Positron Beam Forward Angle Positron Energy 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • A. Zecca
    • 1
  • L. Chiari
    • 1
    • 2
  • E. Trainotti
    • 1
  • D. V. Fursa
    • 3
  • I. Bray
    • 3
  • M. J. Brunger
    • 2
    • 4
  1. 1.Department of PhysicsUniversity of TrentoTrentoItaly
  2. 2.ARC Centre for Antimatter-Matter Studies, School of Chemical and Physical SciencesFlinders UniversityAdelaideSAAustralia
  3. 3.ARC Centre for Antimatter-Matter StudiesCurtin UniversityPerthAustralia
  4. 4.Institute of Mathematical SciencesUniversity of MalayaKuala LumpurMalaysia

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