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Two-photon ionization of the K-shell of an atomic ion
Russian version
Hopersky A. N. 1, Nadolinsky A. M. 1, Koneev R. V. 1
1Rostov State University for Railway Transportation, Rostov-on-Don, Russia
Email: amnrnd@mail.ru
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Theoretical predictions of the analytical structure and absolute values of the generalized cross section of two-photon single ionization of the K-shell of the heavy neon-like atomic ion of iron (Fe16+) are presented. A pronounced resonance subthreshold structure of the generalized cross section and the effect of destructive quantum interference of probability amplitudes of radiative transitions into virtual excited states of p-symmetry are established. The presence of a valence 2p6-shell in the ionic core leads to the emergence of an additional giant resonance in the generalized cross section as an effect of "inverse" hard x-ray emission of the Kα-type 1s^2(2s^2)2p^5+hω-> 1s(2s^2)2p6. A scheme of the proposed experiment with linearly polarized x-ray photons to verify the obtained theoretical results is presented. Keywords: two-photon resonant single ionization, neon-like atomic ion, probability amplitude, generalized cross section.
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