Relativistic theory of the double photoionization of helium-like atoms

Details Relativistic theory of the double photoionization of helium-like atoms Relativistic theory of the double photoionization of helium-like atoms

2011-08-12

arxiv.org/abs/1108.2576v1

Phys. Rev. A 84, 032703 (2011)

Physics

Atomic Physics

Scientific paper

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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