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
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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.
| Creators(s): |
Nikolic, D., Gorczyca, T. W., Korista, K. T. and Badnell, N. R.  ORCID: https://orcid.org/0000-0001-7418-7996;
| Item type: | Article |
|---|---|
| ID code: | 28929 |
| 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 Jan 2021 19:08 |
| Related URLs: | |
| URI: | https://strathprints.strath.ac.uk/id/eprint/28929 |
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