Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rearrangement of electron shells and interchannel interaction in the K
  photoabsorption of Ne   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.

20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math