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Double shake-off model for the triple photoionization of beryllium

Kheifets, A.S. and Bray, I. (2003) Double shake-off model for the triple photoionization of beryllium. Journal of Physics B: Atomic, Molecular and Optical Physics, 36 (13). L211-L217.

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We propose a model for the triple photoionization of Be in which a core 1s electron absorbs the photon γ + 1s22s2Be → epsilon 1p + 1s2s2Be+ and the valence 2s2 electrons are shaken off into continuum due to the sudden change of the core potential. We decompose the double shake-off amplitude into a single shake-off 2s2 → nsepsilons and a subsequent electron impact ionization of the doubly charged Be2+ ion epsilons + 1sns Be2+ → epsilon 2l + epsilon3l + 1s Be3+. The latter process is described by the T-matrix of inelastic electron scattering on the 'semi-hollow' 1sns Be2+ ion in the monopole singlet channel. The convergent close-coupling method is used to evaluate the T-matrix.

Item Type: Journal Article
Murdoch Affiliation: School of Mathematical and Physical Sciences
Publisher: Institute of Physics
Copyright: © 2003 IOP Publishing
Other Information: Letter to the editor
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