Volume 447, Number 1, February III 2006
|Page(s)||379 - 387|
|Section||Atomic, molecular, and nuclear data|
|Published online||27 January 2006|
Dielectronic recombination data for dynamic finite-density plasmas
IX. The fluorine isoelectronic sequence
Department of Physics, Western Michigan University, Kalamazoo, Michigan, 49008-5252, USA e-mail: [gorczyca;korista]@physics.wmich.edu
2 Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
3 Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027-6601, USA e-mail: email@example.com
Accepted: 27 July 2005
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 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 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.
Key words: atomic data / atomic processes / plasmas
© ESO, 2006
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