Large-Scale Calculation of Dielectronic Recombination Parameters for Mg-Like Fe

Published

June 20, 2006

Author(s)

I Murakami, T Kato, D Kato, U I. Safronova, T E. Cowan, Yuri Ralchenko

Abstract

Energy levels, radiative transition probabilities, and autoionization rates for $1s^22s^22p^63l'nl$ ($n$=3-12, $l \le n-1$) and $1s^22s^22p^64l'nl$ ($n$=4-7, $l \le n-1$) states in Mg-like iron (Fe$^14+}$) are calculated by the Hartree-Fock-Relativistic method (Cowan code) and the relativistic many-body perturbation theory method (RMBPT code). Autoionizing levels above three thresholds $1s^22s^22p^63s$, $1s^22s^22p^63p$, and $1s^22s^22p^63d$ are considered. It is found that configuration mixings [$3sns$ + $3pnp$ + $3dnd$] and [$3snp$ + $3pns$ + $3pnd$ + $3dnp$] play an important role for all atomic characteristics. Branching ratios relative to the first threshold and intensity factors are calculated for satellite lines, and dielectronic recombination (DR) rate coefficients are determined for the excited 444 odd-parity and 419 even-parity states. It is shown that the contribution of the high-excited states is very important for calculation of total DR rates. Contributions from the excited $1s^22s^22p^63l'nl$ states with $n \ge 12$ and $1s^22s^22p^64l'nl$ states with $n \ge 7$ to DR rate coefficients are estimated by extrapolation of all atomic parameters. The total DR rate coefficient is derived as a function of electron temperature.

Citation

Journal of Physics B-Atomic Molecular and Optical Physics

Volume

39

Pub Type

Journals

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Keywords

autoionization states, dielectronic recombination, dielectronic satellites, Mg-like iron, rate coefficients

Citation

Murakami, I. , Kato, T. , Kato, D. , Safronova, U. , Cowan, T. and Ralchenko, Y. (2006), Large-Scale Calculation of Dielectronic Recombination Parameters for Mg-Like Fe, Journal of Physics B-Atomic Molecular and Optical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=840828 (Accessed December 13, 2024)