Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photoionization cross section calculations for the halogen-like ions
  Kr$^+$ and Xe$^+$   Photoionization cross sections calculations on the halogen-like ions; Kr$^+$
and Xe$^+$ have been performed for a photon energy range from each ion
threshold to 15 eV, using large-scale close-coupling calculations within the
Dirac-Coulomb R-matrix approximation. The results from our theoretical work are
compared with recent measurements made at the ASTRID merged-beam set-up at the
University of Aarhus in Denmark and from the Fourier transform ion cyclotron
resonance (FT-ICR) trap method at the SOLEIL synchrotron radiation facility in
Saint-Aubin, France and the Advanced Light Soure (ALS). For each of these
complex ions our theoretical cross section results over the photon energy range
investigated are seen to be in excellent agreement with experiment. Resonance
energy positions and quantum defects of the prominent Rydberg resonances series
identified in the spectra are compared with experiment for these complex
halogen like-ions.

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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga