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

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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Correspondence to Victor L. Sukhorukov.

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Contribution to the Topical Issue “Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces (2018)”, edited by Károly Tőkési, Béla Paripás, Gábor Pszota, and Andrey V. Solov’yov.

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Novikovskiy, N.M., Rezvan, D.V., Ivanov, N.M. et al. Rearrangement of electron shells and interchannel interaction in the K photoabsorption of Ne. Eur. Phys. J. D 73, 22 (2019). https://doi.org/10.1140/epjd/e2018-90539-2

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