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Volume 412, Number 2, December III 2003
Page(s) 587 - 595
Section Celestial mechanics and astrometry
DOI https://doi.org/10.1051/0004-6361:20031462
Published online 28 November 2003

A&A 412, 587-595 (2003)
DOI: 10.1051/0004-6361:20031462

Dielectronic recombination data for dynamic finite-density plasmas

II. The oxygen isoelectronic sequence
O. Zatsarinny1, T. W. Gorczyca1, K. T. Korista1, N. R. Badnell2 and D. W. Savin3

1  Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA
    e-mail: oleg.zatsarinny@wmich.edu; [gorczyca; korista]@physics.wmich.edu
2  Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
3  Columbia Astrophysics Laboratory, Columbia University, New York, 10027, USA
    e-mail: savin@astro.columbia.edu

(Received 19 May 2003 / Accepted 18 September 2003)

Dielectronic recombination (DR) and radiative recombination (RR) data for oxygen-like ions forming fluorine-like ions have been calculated as part of the assembly of a level-resolved DR and RR database necessary for modelling of dynamic finite-density plasmas (Badnell et al. 2003). Total DR and RR rate coefficients for F + to Zn 22+ are presented and the results discussed. By comparison between perturbative and R-matrix results, we find that RR/DR interference effects are negligible even for the lowest-charged F + member. We also find that the $2 \to 2$ low-temperature DR (no change in the principal quantum number of the core electrons) does not scale smoothly with nuclear charge Z due to resonances straddling the ionization limit, thereby making explicit calculations for each ion necessary. These RR and 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

Offprint request: T. W. Gorczyca, thomas.gorczyca@wmich.edu

© ESO 2003

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