Dielectronic recombination data for dynamic finite-density plasmas IX: The fluorine isoelectronic sequence

O. Zatsarinny, T.W. Gorczyca, J. Fu, K.T. Korista, N.R. Badnell, D.W. Savin

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Abstract

Partial and total dielectronic recombination (DR) rate coefficients for fluorine- like ions forming neon-like systems have been calculated as part of the assembly of a final-state level-resolved DR database necessary for the modelling of dynamic finite-density plasmas (Badnell et al. 2003). Calculations have been performed for DR of both ground and metastable initial states for Ne+ to Zn21+, as well as for Kr27+, Mo33+, and Xe45+. Results for a selection of ions are presented and discussed. We find that low-temperature DR, via 2 -> 2 core excitations involving no change in the principal quantum number of the core electron, does not scale smoothly with nuclear charge Z due to resonances straddling the ionization limit of the recombined system, thereby making explicit calculations for each ion necessary. Most of the earlier calculations neglected contributions from the fine-structure 2p(3/2)-2p(1/2) excitation which has been shown to be very important for low-temperature DR coefficients. The DR data are suitable for modelling of solar and cosmic plasmas under conditions of collisional ionization equilibrium, photoionization equilibrium, and non-equilibrium ionization.

Original languageEnglish
Pages (from-to)379-387
Number of pages9
JournalExperimental Astronomy
Volume447
Issue number1
DOIs
Publication statusPublished - Feb 2006

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Keywords

  • atomic data
  • atomic processes
  • plasmas
  • high temperature plasmas
  • ionization equilibrium
  • rate coefficients
  • laboratory measurements
  • theoretical calculations
  • radiative recombination
  • core excitations
  • FE-XVIII
  • H-like
  • ions

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