Research

Energy dependence of the positronium formation cross-section in argon


Reference:

Thornton, M. J. and Coleman, P. G., 2011. Energy dependence of the positronium formation cross-section in argon. Journal of Physics B: Atomic Molecular and Optical Physics, 44 (14), 145201.

Related documents:

[img]
Preview
PDF (Coleman_JoPB_2011_44_14_145201.pdf) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (565kB) | Preview

    Official URL:

    http://dx.doi.org/10.1088/0953-4075/44/14/145201

    Abstract

    The positronium (Ps) formation cross-section, Q(Ps), for positron-argon interactions has been measured for incident positron energies from threshold to 60 eV, in an attempt to resolve the apparent discrepancy between earlier experimental results. Q(Ps) was found to vary smoothly with positron energy between 15 and 30 eV, in qualitative agreement with earlier results using methods involving the measurement of positron neutralization (as in the current experiment) and in disagreement with the double-peak energy dependence reported by Laricchia et al (2002 J. Phys. B: At. Mol. Opt. Phys. 35 2525-40), who used a positron-ion coincidence detection method. Possible reasons for this discrepancy, including Ps fragmentation and excited-state Ps formation, are discussed.

    Details

    Item Type Articles
    CreatorsThornton, M. J.and Coleman, P. G.
    DOI10.1088/0953-4075/44/14/145201
    DepartmentsFaculty of Science > Physics
    Publisher StatementColeman_JoPB_2011_44_14_145201.pdf: © 2011 IOP Publishing Ltd; Coleman_JoPB_2011_44_14_145201.docx: © 2011 IOP Publishing Ltd
    RefereedYes
    StatusPublished
    ID Code25094

    Export

    Actions (login required)

    View Item

    Document Downloads

    More statistics for this item...