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R-matrix electron-impact excitation data for the Li-like iso-electronic sequence including Auger and radiation damping

Liang, G. Y. and Badnell, N. R. (2011) R-matrix electron-impact excitation data for the Li-like iso-electronic sequence including Auger and radiation damping. Experimental Astronomy, 528. A69. ISSN 0922-6435

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Abstract

We present results for the electron-impact excitation of all Li-like ions from Be+ to Kr33+ which we obtained using the radiation- and Auger-damped intermediate-coupling frame transformation R-matrix approach. We have included both valence- and core-electron excitations up to the 1s(2)5l and 1s2l4l' levels, respectively. A detailed comparison of the target structure and collision data has been made for four specific ions (O5+, Ar15+, Fe23+ and Kr33+) spanning the sequence so as to assess the accuracy for the entire sequence. Effective collision strengths (gamma s) are presented at temperatures ranging from 2 x 10(2)(z + 1)(2) K to 2 x 10(6)(z + 1)(2) K (where z is the residual charge of the ions, i.e. Z - 3). Detailed comparisons for the gamma s are made with the results of previous calculations for several ions which span the sequence. The radiation and Auger damping effects were explored for core-excitations along the iso-electronic sequence. Furthermore, we examined the iso-electronic trends of effective collision strengths as a function of temperature.

Item type: Article
ID code: 31247
Keywords: atomic data, atomic processes, plasmas, dielectronic satellite spectra, collision strengths, FE-XXIV, 1S2L2L' configurations, innershell excitation, emission lines, ions, recombination, Astronomy, Astronomy and Astrophysics, Space and Planetary Science
Subjects: Science > Astronomy
Department: Faculty of Science > Physics
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Depositing user: Pure Administrator
Date Deposited: 21 May 2011 15:55
Last modified: 27 Mar 2014 09:21
URI: http://strathprints.strath.ac.uk/id/eprint/31247

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