Low-energy positron interactions with xenon

Details Low-energy positron interactions with xenon Low-energy positron interactions with xenon

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13l5004m&link_type=abstract

New Journal of Physics, Volume 13, Issue 12, pp. 125004 (2011).

Physics

2

Scientific paper

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 regions corresponding to the 2P3/2 and 2P1/2 states of the Xe+ ion. The present results are compared with both experimental and theoretical values from the literature where available.

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