Positron scattering from molecular hydrogen

J. R. Machacek, E. K. Anderson, C. Makochekanwa, S. J. Buckman, J. P. Sullivan

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    30 Citations (Scopus)

    Abstract

    We present results for total and partial cross sections for positron scattering from H2. The total scattering and positronium formation cross sections are reported between 0.5 and 200 eV. Total quasielastic and inelastic scattering cross sections are reported for energies between the positronium formation threshold and 50 eV, with quasielastic differential scattering cross sections reported at 1, 3, 5, 7, and 10 eV. Our results are compared with previous work, both experimental and theoretical, with particular attention paid to the region below the positronium formation threshold, where there are apparent discrepancies in previous work. A discussion of possible reasons for discrepancies between this and previous work is presented, including a focus on known systematic effects in the experimental results.

    Original languageEnglish
    Article number042715
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume88
    Issue number4
    DOIs
    Publication statusPublished - 31 Oct 2013

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