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    Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

    245586_245586.pdf (685.0Kb)
    Access Status
    Open access
    Authors
    Schoffler, M.
    Stuck, C.
    Waitz, M.
    Trinter, F.
    Jahnke, T.
    Lenz, U.
    Jones, M.
    Belkacem, A.
    Landers, A.
    Pindzola, M.
    Cocke, C.
    Colgan, J.
    Kheifets, A.
    Bray, Igor
    Schmidt-Bocking, H.
    Dorner, R.
    Weber, T.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Schoffler, M. and Stuck, C. and Waitz, M. and Trinter, F. and Jahnke, T. and Lenz, U. and Jones, M. et al. 2013. Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption. Physical Review Letters. 111 (1): pp. 013003-1-013003-5.
    Source Title
    Physical Review Letters
    DOI
    10.1103/PhysRevLett.111.013003
    ISSN
    0031-9007
    School
    Department of Physics and Astronomy
    Remarks

    Copyright © 2013 by the American Physical Society

    URI
    http://hdl.handle.net/20.500.11937/34709
    Collection
    • Curtin Research Publications
    Abstract

    We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago [ J. Phys. B 8 1248 (1975)]. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.

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