I. Murakami, T. Kato, U.I. Safronova and A.A. Vasilyev


Dielectronic Recombination Rate Coefficients to Excited States of Boronlike Oxygen and Dielectronic Satellite Lines

Date of publication:

May 2004

Key words:

boronlike oxygen, dielectronic recombination rate coeffcients, energy levels, radiative transition probabilities, autoionization rates, excited states, dielectronic satellite lines


Energy levels, radiative transition probabilities, and autoionization rates for B-like oxygen (0^3+) including 1s^2 2s^2 nl, 1s^2 2s2pnl, and 1s^2 2p^2nl (n=2-8, l leq n - 1) states were calculated by multiconfigurational Hartree-Fock method (Cowan code) and relativistic many-body perturbation theory method (RMBPT code). Autoionizing levels above three thresholds (1s^2 2s^2 ^1S, 1s^2 2s2p^3P, 1s^2 2s2p ^1P) were considered. Configuration mixing (2s^2nl + 2p^2nl) plays an important for all atomic characteristics. Branching ratios relative to the first threshold and intensity factor were calculated for satellites lines and dielectronic recombination rate coefficients for the excited 105 odd-parity and 94 even-parity states. The dielectronic recombination rate coefficients were calculated including 1s^2 2s^2 nl, 1s^2 2s2pnl, and 1s^2 2p^2nl (n=2-8, l leq n - 1) states. The contribution from the excited states higher than n=8 were estimated by extrapolation of all atomic characteristics to derive the total dielectronic recombination rate coefficient. The orbital angular momentum quantum number l distribution of the rate coefficients shows a peak at l=5. The total dielectronic recombination rate coefficient was derived as a function of electron temperature. The dielectronic satellite lines were also obtained. The state selective dielectronic recombination rate coefficients to excited states of B-like oxygen were obtained, which are useful for modeling O IV spectral lines in a recombining plasma.

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