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arXiv · 2105.09706

Rearrangement of electron shells and interchannel interaction in the K photoabsorption of Ne

N. M. Novikovskiy·D. V. Rezvan·N. M. Ivanov·I. D. Petrov·B. M. Lagutin·A. Knie·A. Ehresmann·Ph. V. Demekhin·V. L. Sukhorukov
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Abstract

A detailed theoretical analysis of the 1s photoionization of neon is presented. It is found that the most significant many-electron correlation in computing photoionization of inner shells is the rearrangement of the outer shells caused by the inner vacancy. Further noticeable effects are: (i) the polarization of the ion core by the outgoing photoelectron and (ii) the coherent effect of double excitation/ionization. The core polarization increases the photoionization cross section by about 10% at the 1s threshold, and the coherent excitation results in further increases by about 5%. Incoherent excitation of the satellite channel leads to an additional 10% increase in the photoabsorption cross section in the double-ionization threshold region.

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N. M. Novikovskiy, D. V. Rezvan, N. M. Ivanov, I. D. Petrov, B. M. Lagutin, A. Knie, A. Ehresmann, Ph. V. Demekhin, V. L. Sukhorukov. 2021-05-20. Rearrangement of electron shells and interchannel interaction in the K photoabsorption of Ne. https://doi.org/10.1140/epjd%2Fe2018-90539-2

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