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arXiv · 1108.2576

Relativistic theory of the double photoionization of helium-like atoms

V. A. Yerokhin·A. Surzhykov
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Abstract

A fully relativistic calculation of the double photoionization of helium-like atoms is presented. The approach is based on the partial-wave representation of the Dirac continuum states and accounts for the retardation in the electron-electron interaction as well as the higher-order multipoles of the absorbed photon. The electron-electron interaction is taken into account to the leading order of perturbation theory. The relativistic effects are shown to become prominent already for the medium-Z ions, changing the shape and the asymptotic behaviour of the photon energy dependence of the ratio of the double-to-single photoionization cross section.

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V. A. Yerokhin, A. Surzhykov. 2011-08-12. Relativistic theory of the double photoionization of helium-like atoms. https://doi.org/10.1103/physreva.84.032703

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