Photoionization accompanied by excitation at intermediate photon energies

Details Photoionization accompanied by excitation at intermediate photon energies Photoionization accompanied by excitation at intermediate photon energies

2007-11-13

arxiv.org/abs/0711.1929v1

Physics

Quantum Physics

3 figures

Scientific paper

10.1103/PhysRevA.77.012715

We calculate the photoionization with excitation-to photoionization ratios for atomic helium and heliumlike ions at intermediate values of the photon energies. The final state interactions between the electrons are included in the lowest order of their Sommerfeld parameter. This enables us, in contrast to purely numerical calculations to investigate the roles of various mechanisms contributing beyond the high energy limit. The system of the two bound electrons is described by the functions obtained by the Correlation Function Hyperspherical Harmonic Method. For the case of heliumlike ions we present the high energy limits as power expansion in inverse charge of the nucleus. We analyse the role of excitation of states with the nonzero orbital momenta.

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