Dielectronic recombination data for dynamic finite-density plasmas

Free access article

Issue		A&A Volume 474, Number 3, November II 2007


Page(s)		1051 - 1059
Section		Atomic, molecular, and nuclear data
DOI		http://dx.doi.org/10.1051/0004-6361:20078238

A&A 474, 1051-1059 (2007)
DOI: 10.1051/0004-6361:20078238

XIII. The magnesium isoelectronic sequence

Z. Altun¹, A. Yumak¹, I. Yavuz¹, N. R. Badnell², S. D. Loch³, and M. S. Pindzola³

¹ Department of Physics, Marmara University, Istanbul 34722, Turkey
e-mail: zikalt@superonline.com
² Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK
³ Department of Physics, Auburn University, Auburn, AL 36849, USA

(Received 6 July 2007 / Accepted 5 September 2007)

Abstract
We have calculated total and partial final-state level-resolved dielectronic recombination (DR) rate coefficients for the ground and metastable initial levels of 21 Mg-like ions between Al⁺ and Xe⁴²⁺. This is the final part of the assembly of a level-resolved DR database necessary for modelling dynamic finite-density plasmas within the generalized collisional-radiative framework. Calculations have been performed in both LS- and intermediate coupling, allowing for $\Delta n$ = 0 and $\Delta n$ = 1 core-excitations from ground and metastable levels. Complementary partial and total radiative recombination RR coefficients have been calculated for the same ions viz. Al⁺ through Zn¹⁸⁺, as well as Kr²⁴⁺, Mo³⁰⁺, and Xe⁴²⁺. Fitting coefficients which describe the total RR and DR rate coefficients (separately) are also presented here. Results for a selection of ions from this sequence are discussed, and compared with existing theoretical and experimental results. A full set of results can be accessed from the Atomic Data and Analysis Structure (ADAS) database or from the Oak Ridge Controlled Fusion Atomic Data Center (http://www-cfadc.phy.ornl.gov/data_and_codes). The complexity of further M-shell sequences, both from the atomic and modelling perspectives, renders this juncture a natural conclusion for the assemblage of the partial database. Further M-shell work, has and will, focus more on total rate coefficients, rather than partials, at least in the medium term.

Key words: atomic data -- atomic processes -- plasmas

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