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

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

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...447..379z&link_type=abstract

Astronomy and Astrophysics, Volume 447, Issue 1, February III 2006, pp.379-387

Astronomy and Astrophysics

Astrophysics

14

Atomic Data, Atomic Processes, Plasmas

Scientific paper

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 2p3/2-2p1/2 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.

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