Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...474.1051a&link_type=abstract
Astronomy and Astrophysics, Volume 474, Issue 3, November II 2007, pp.1051-1059
Astronomy and Astrophysics
Astrophysics
13
Atomic Data, Atomic Processes, Plasmas
Scientific paper
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 Δ n = 0 and Δ 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.
Altun Zikri
Badnell Nigel R.
Loch S. D.
Pindzola M. S.
Yavuz İ.
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