Relativistic theory of the double photoionization of helium-like atoms

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.

References in corpus (4)

• From Useful Algorithms for Slowly Convergent Series to Physical Predictions Based on Divergent Perturbative Expansions
• Electron-atom bremsstrahlung: double differential cross section and polarization correlations
• Photoionization of helium-like ions in asymptotic nonrelativistic region
• The off-resonant dielectronic recombination in a collision of an electron with a heavy hydrogen-like ion

Cited by in corpus (4)

• Many-electron effects on the x-ray Rayleigh scattering by highly charged He-like ions
• Near--K-edge double and triple detachment of the F- negative ion: observation of direct two-electron ejection by a single photon
• Relativistic calculations of double $K$-shell photoionization for neutral medium-$Z$ atoms
• Two-photon Annihilation of Positrons with K-shell Electrons of H-like ions