Velocity scaling of ion neutralization in low energy ion scattering

M. Draxler, R. Gruber, H.H. Brongersma, P. Bauer

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    Abstract

    The ion fraction P+ is measured for He+ ions scattered by 129° from a Cu surface. Both the primary energy and the angles of incidence and of exit are varied. From our results we conclude the following: along the incoming and outgoing trajectories, neutralization is due to Auger processes and depends on the normal velocity component v¿ only. At higher energies, additional charge exchange is due to collision induced neutralization and reionization, both depending on the total ion energy only. Also in this regime P+ depends on v¿, but via a two-valued function of the scattering geometry at fixed energy
    Original languageEnglish
    Article number263201
    Pages (from-to)263201-1/4
    Number of pages4
    JournalPhysical Review Letters
    Volume89
    Issue number26
    DOIs
    Publication statusPublished - 2002

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