
Author(s):
I. Murakami, T. Kato, D. Kato, U.I. Safronova, T.E. Cowan and Yu. Ralchenko

Title:
Atomic Data for Dielectronic Recombinatin into Mglike Fe
Date of publication:
Mar. 2006

Key words:
Mglike iron, dielectronic recombination rate coefficients, energy levels, radiative transition probabilities, autoionization rates, excited states, dielectronic satellite lines

Abstract:
Energy levels, radiative transition probabilities, and autoionization ratesfor 1s^2 2s^2 2p^6 3l'nl (n=312, l leq n1) and 1s^2 2s^2 2p^6 4l'nl (n=47, l leq n1) states in Mglike iron (Fe^14+) are calculated by the HartreeFockRelativistic method (Cowan code) and the relativistic manybody perturbation theory method (RMBPT code). Autoionizing levels above three thresholds 1s^2 2s^2 2p^6 3s, 1s^2 2s^2 2p^6 3p, and 1s^2 2s^2 2p^6 3d are considered. It is found that configuration mixing [3sns + 3pnp + 3dnd], [3snp + 3pns + 3pnd + 3dnp] play an important role for all atomic characteristics. Branching ratios relative to the first threshold and intensity factors for satellite lines are calculated, and dielectronic recombination (DR) rate coefficients are determined for the excited 444 oddparity and 419 evenparity states. It is shown that the contribution of the highlyexcited states is very important for calculation of DR rates. Contributions from the excited 1s^2 2s^2 2p^6 3l'nl states with n leq 12 and 1s^2 2s^2 2p^6 4l'nl states with n leq 7 to DR rate coefficients are estimated by extrapolation of all atomic characteristics. The total DR rate coefficient is derived as a function of electron temperature.

