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Low-energy positron interactions with krypton

C. Makochekanwa, J. R. Machacek, 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, and M. Hoshino
Phys. Rev. A 83, 032721 – Published 30 March 2011
Physics logo See Synopsis: Decrypting krypton

Abstract

Cross sections for positron scattering from krypton have been measured with an energy resolution of ∼60 meV over the energy range 0.5–60 eV. Absolute values of the grand total (σGT), positronium formation (σPs), and grand total minus positronium formation (σGTσPs,) cross sections are presented. Theoretical estimations of σGT and σGTσPs are also performed for this target using the convergent close-coupling method and the relativistic optical potential approach. We also provide experimental and theoretical results for elastic differential cross sections, for selected energies both below and above the Ps threshold. Where available, the present results are compared to both experimental and theoretical values from the literature.

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  • Received 25 December 2010

DOI:https://doi.org/10.1103/PhysRevA.83.032721

©2011 American Physical Society

Synopsis

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Decrypting krypton

Published 31 March 2011

Improved data from positron scattering off krypton may lead to advances in certain techniques in tomography and spectroscopy.

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Authors & Affiliations

C. Makochekanwa, J. R. Machacek, A. C. L. Jones, P. Caradonna, D. S. Slaughter, R. P. McEachran, J. P. Sullivan, and S. J. Buckman*

  • ARC Centre for Antimatter-Matter Studies, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia

S. Bellm and B. Lohmann

  • ARC Centre for Antimatter-Matter Studies, The University of Adelaide, Adelaide, South Australia, Australia

D. V. Fursa and I. Bray

  • ARC Centre for Antimatter-Matter Studies, Curtin University of Technology, GPO Box U1987, Perth, Western Australia 6845, Australia

D.W. Mueller

  • Physics Department, University of North Texas, Denton, Texas 76201, USA

A. D. Stauffer

  • Department of Physics and Astronomy, York University, Toronto, Canada

M. Hoshino

  • Department of Physics, Sophia University, Chiyoda-ku, Tokyo, Japan

  • *Stephen.Buckman@anu.edu.au

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Issue

Vol. 83, Iss. 3 — March 2011

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