Matter and Radiation at Extremes, 2020, 5 (6): 064201, Published Online: Nov. 24, 2020
Dielectronic recombination in non-LTE plasmas
Figures & Tables
Fig. 1. Energy-level diagram of the He-like autoionizing levels 2l 2l ′ and their associated radiative decays, so-called Lyα satellites. After radiative decay, the singly excited states 1s 2l 1,3L are formed, from which further radiative decay proceeds (e.g., the resonance and intercombination lines W and Y, respectively). Also indicated are the Li-like autoionizing levels 1s 2l 2l ′.
Fig. 2. MARIA simulations of dielectronic satellite emission near Lyα of H-like Mg ions for different values of the electron density at kT e = 100 eV. The red arrows indicate the rises in intensity of particular satellite transitions with increasing density. Satellites indicated in blue have effective negative screening due to strong angular-momentum coupling effects.
Fig. 3. Comparison of the l -averaged statistical approach with the Burgess and quantum level-by-level calculations for the Ni-like sequence 3s 23p 63d 10 of Xe26+ and Au51+.
Table1. Bd factors according to Eqs. (3.20) and (3.21) for DR into Li-like ions originating from the 1s2nln′l′ autoionizing levels, with Z = Zn − 2, m = 1, and l0 = 0. The numerical data show single- and multichannel approximations as well as the corresponding factors according to the Burgess approach (note that the different numerical coefficients and the oscillator strength in the original Burgess formula [Eq. (3.10) ] compared with Eq. (3.20) have been included in the value for to facilitate comparison of the different methods).
|
Table2. Fitting coefficients according to Eqs. (3.20) and (3.21) for DR into H-like ions originating from the 2lnl′ and 3lnl′ autoionizing levels, with Z = Zn, m = 1, and l0 = 0. The numerical data include corrections for multiple decay channels (two channels for 2lnl′ and four channels for 3lnl′).
|
Table3. Fitting coefficients according to Eqs. (3.20) and (3.21) for DR into He-like ions originating from the 1s2lnl′ and 1s3lnl′ autoionizing levels, with Z = Zn − 1, m = 2, and l0 = 0. The numerical data include corrections for multiple decay channels (two channels for 1s2lnl′ and four channels for 1s3lnl′).
|
Table4. Fitting coefficients according to Eqs. (3.20) and (3.21) for DR into Li-like ions originating from the 1s22lnl′ and 1s23lnl′ autoionizing levels, with Z = Zn − 2, m = 1, and l0 = 0. The numerical data include corrections for multiple decay channels (one channel for 1s22lnl′ and four channels for 1s23lnl′).
|
Table5. Fitting coefficients according to Eqs. (3.20) and (3.21) for DR into excited states of Li-like ions originating from the 1s23lnl′ and 1s24lnl′ autoionizing levels, with Z = Zn − 2, m = 1, and l0 = 1. The numerical data include corrections for multiple decay channels (three channels for 1s23lnl′ and six channels for 1s24lnl′).
|
Table6. Field-free autoionization decay rates (s−1) including intermediate coupling, configuration, and magnetic interaction.
|
F. B. Rosmej, V. A. Astapenko, V. S. Lisitsa, L. A. Vainshtein. Dielectronic recombination in non-LTE plasmas[J]. Matter and Radiation at Extremes, 2020, 5(6): 064201.