https://doi.org/10.1140/epjp/s13360-026-07616-6
Regular Article
K- and L-shell photoabsorption of Ne-like Fe XVII and Ni XIX ions using relativistic configuration-interaction approach
Applied Physics Department, Tafila Technical University, P. O. Box 179, 66110, Tafila, Jordan
a
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Received:
19
December
2025
Accepted:
25
March
2026
Published online:
7
April
2026
Abstract
Photoionization data for the 2s22p6 (1S0) ground state of Ne-like iron (Fe XVII) and nickel (Ni XIX) ions are reported. The calculations of ionization limit, transition energy, quantum defect, radiative transition probabilities, and oscillator strength were carried out using the Flexible Atomic Code's Relativistic Configuration-Interaction (FAC-RCI) capability for various Rydberg series. Detailed comparisons of resonance energies and quantum defects with previous theoretical calculations and the NIST data are carried out for both ions to assess the accuracy of the present calculations. In addition, new calculations for K-shell photoexcitations (1s2s22p6 np (1P1)) in these ions are reported. The datasets obtained here are expected to support high-precision spectral modeling in both astrophysical and laboratory plasma environments.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjp/s13360-026-07616-6.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
