Dielectronic recombination data for dynamic finite-density plasmas - XIII: The magnesium isoelectronic sequence

Z. Altun, A. Yumak, I. Yavuz, N. R. Badnell, S. D. Loch, M. S. Pindzola

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We have calculated total and partial final- state level- resolved dielectronic recombination ( DR) rate coe. cients 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 levelresolved 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. n = 0 and. n = 1 core- excitations from ground and metastable levels. Complementary partial and total radiative recombination RR coeficients have been calculated for the same ions viz. Al+ through Zn18+, as well as Kr24+, Mo30+, and Xe42+. Fitting coeficients which describe the total RR and DR rate coeficients (separately) are also presented here. Results for a selection of ions fromthis 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 coe. cients, rather than partials, at least in the medium term.

Original languageEnglish
Pages (from-to)1051-1059
Number of pages9
JournalAstronomy and Astrophysics
Volume474
Issue number3
DOIs
Publication statusPublished - Nov 2007

Keywords

  • atomic data
  • atomic processes
  • plasmas
  • electron ion recombination
  • active galactic nuclei
  • optically thin plasmas
  • X-Ray absorption
  • ionization equilibrium
  • rate coefficients
  • low temperatures
  • emission rates
  • M-shell
  • FE-XIV

Cite this