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    Target structure-induced suppression of the ionization cross section for low-energy antiproton-molecular hydrogen collisions: Theoretical confirmation

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    Authors
    Abdurakhmanov, Ilkhom
    Kadyrov, Alisher
    Fursa, Dmitry
    Bray, Igor
    Date
    2013
    Type
    Journal Article
    
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    Citation
    Abdurakhmanov, I.B. and Kadyrov, A.S. and Fursa, D.V. and Bray, I. 2013. Target structure-induced suppression of the ionization cross section for low-energy antiproton-molecular hydrogen collisions: Theoretical confirmation. Physical Review Letters. 111 (17): 173201 (6 pp.).
    Source Title
    Physical Review Letters
    DOI
    10.1103/PhysRevLett.111.173201
    ISSN
    0031-9007
    URI
    http://hdl.handle.net/20.500.11937/13760
    Collection
    • Curtin Research Publications
    Abstract

    Theoretical confirmation of the experimentally observed phenomenon [Knudsen et al., Phys. Rev. Lett. 105, 213201 (2010)] of target structure-induced suppression of the ionization cross section for low-energy antiproton-molecular hydrogen collisions is given. To this end a novel time-dependent convergent close-coupling approach to the scattering problem that accounts for all possible orientations of the molecular target, has been developed. The approach is applied to study single ionization of molecular hydrogen on the wide energy range from 1 keV to 2 MeV with a particular emphasis on low energies. Results for the orientation-averaged total single ionization cross section are compared with available experimental data and good agreement is found at low (< 20 keV ) and high (> 90 keV ) energies. A minor discrepancy is found within a small energy gap near the maximum of the cross section.

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