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Photo double ionization of helium 100 eV and 450 eV above threshold: I. Linearly polarized light

Knapp, A., Kheifets, A., Bray, I., Weber, T., Landers, A.L., Schössler, S., Jahnke, T., Nickles, J., Kammer, S., Jagutzki, O., Schmidt, L.Ph.H, Schöffler, M., Osipov, T., Prior, M.H., Schmidt-Böcking, H., Cocke, C.L. and Dörner, R. (2005) Photo double ionization of helium 100 eV and 450 eV above threshold: I. Linearly polarized light. Journal of Physics B: Atomic, Molecular and Optical Physics, 38 (6). pp. 615-633.

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We present a joint experimental and theoretical study for the fully differential cross section of the photo double ionization (PDI) of helium with linearly polarized light at the excess energies E exc = 100 eV and 450 eV above the threshold. The fully differential cross section is obtained by measuring the three-dimensional momentum vectors of one electron and the He 2+ ion in coincidence using the COLTRIMS method. We give an overview of the momentum distribution of the three-body continuum 100 eV above the threshold. We show angular distributions for both electrons for various energy sharings at E exc = 100 eV and 450 eV. The experimental results are well reproduced by a set of convergent close-coupling (CCC) calculations.

Item Type: Journal Article
Murdoch Affiliation(s): Centre for Atomic, Molecular and Surface Physics
Publisher: Institute of Physics
Copyright: © 2005 IOP Publishing Ltd.
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