Dielectronic recombination of argon-like ions

Nikolic, D. and Gorczyca, T. W. and Korista, K. T. and Badnell, N. R. (2010) Dielectronic recombination of argon-like ions. Astronomy and Astrophysics, 516. A97. ISSN 0004-6361 (https://doi.org/10.1051/0004-6361/201014485)

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Abstract

Context. We present a theoretical investigation of dielectronic recombination (DR) of Ar-like ions that sheds new light on the behavior of the rate coefficient at low-temperatures where these ions form in photoionized plasmas. Aims. We provide results for the total and partial Maxwellian-averaged DR rate coefficients from the initial ground level of K II-Zn XIII ions. It is expected that these new results will advance the accuracy of the ionization balance for Ar-like M-shell ions and pave the way towards a detailed modeling of astrophysically relevant X-ray absorption features. Methods. We utilize the AUTOSTRUCTURE computer code to obtain the accurate core-excitation thresholds in target ions and carry out multiconfiguration Breit-Pauli (MCBP) calculations of the DR cross section in the independent-processes, isolated-resonance, distorted-wave (IPIRDW) approximation. Results. Our results mediate the complete absence of direct DR calculations for certain Ar-like ions and question the reliability of the existing empirical rate formulas, often inferred from renormalized data within this isoelectronic sequence.

ORCID iDs

Nikolic, D., Gorczyca, T. W., Korista, K. T. and Badnell, N. R. ORCID logoORCID: https://orcid.org/0000-0001-7418-7996;
  • Item type:Article
    ID code:28929
    Dates:
    Date
    Event
    21 July 2010
    Published
    Keywords:atomic data, atomic processes, plasmas, scattering, electron-impact excitation, optically thin plasmas, active galactic nuclei, collisional ionization equilibrium, R-matrix method, rate coefficients, energy-levels, ni-xi, density plasmas, Physics, Astronomy and Astrophysics, Space and Planetary Science
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:17 Mar 2011 12:44
    Last modified:20 May 2023 03:46
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/28929
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