Computation of Dielectronic Recombination Data for the Carbonlike, Fluorinelike, and Oxygenlike Isoelectronic Sequences

Details Computation of Dielectronic Recombination Data for the Carbonlike, Fluorinelike, and Oxygenlike Isoelectronic Sequences Computation of Dielectronic Recombination Data for the Carbonlike, Fluorinelike, and Oxygenlike Isoelectronic Sequences

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.1501z&link_type=abstract

American Astronomical Society, HEAD meeting #7, #15.01; Bulletin of the American Astronomical Society, Vol. 35, p.620

Astronomy and Astrophysics

Astrophysics

Scientific paper

We have systematically calculated rate coefficients for dielectronic recombination (DR) along the carbonlike, fluorinelike, and oxygenlike sequences. A recent benchmarking of DR resonance strengths and energies between our theoretical techniques and the experimental results from the Test Storage Ring in Heidelberg has already shown fairly good agreement for the most highly-ionized systems we consider here, DR of Fe XVI, Fe XVII, and Fe XXI. At the low-charge end of this isoelectronic sequence, we benchmark our results using singly-ionized DR data which are determined from measured neutral photoionization measurements and the principle of detailed balance. To assess the reliability of our calculations for intermediate ionization stages, we compare between theoretical R-matrix and perturbative results. All calculations have been performed in intermediate-coupling, so that fine structure effects are incorporated. Furthermore, both Δ n=0 and Δ n>0 core transitions are included in order to span a higher temperature range. Final-state-resolved rate coefficients and total rate coefficients have been tabulated, and these data are available in either format from our web site http://homepages.wmich.edu/ ˜gorczyca/drdata .
This work was supported by NASA Space Astrophysics Research and Analysis Program grant NAG5-10448.

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