Dielectronic Recombination Rate Coefficients of Na‐like Ions from Mg ii to Zn xx Forming Mg‐like Systems

Abstract

Dielectronic recombination (DR) rate coefficients for Na-like ions of elements with 12 Z 30 forming Mglike systems are calculated in the independent-process, isolated-resonance approximation. Both Á N ¼ 0 and ÁN > 0 core excitation DR channels are included, as well as the inner-shell excitation channels. Convenient analytic fits are given to the calculated rate coefficients, and comparison is made with the existing theoretical and experimental results.

Electron-ion recombination ofSiIVformingSiIII: Storage-ring measurement and multiconfiguration Dirac-Fock calculations

“…In Figure 9 we also compare our experimentallyderived DR rate coefficient with the experimental result of Orban et al [9] and with recent theoretical results of Gu [46] and Altun et al [37].…”

“…The experimental results without DR extrapolation is shown by the thin solid line. Also shown are recent theoretical calculations of the DR rate coefficient by Gu [46] (thick dash-dot-dotted line, labeled Gu) and Altun et al [37] (thick dash-dotted line, labeled Altun), and the recent experimental DR rate coefficient by Orban et al [9] (thick dashed line, labeled Orban). The contribution from the experimentally measured DR resonances between 0 and 6 eV is shown as the thin dotted line (labeled Exp < 6 eV) while the contribution of the MCDF calculation in the same energy range is shown as thick dotted line (labeled MCDF).…”

Fe15+dielectronic recombination and the effects of configuration interaction between resonances with different captured electron principal quantum numbers

“…Including the 2s → 3l promotion channel gives improved agreement between theory and experiment in the collision energy range of 400-500 eV. The resonances between 400 and 450 eV agree better with the experiment than do the previous FAC results [5]. Also, the resonance at ∼470 eV does not appear unless this excitation channel is included.…”

“…Including this single-n CI reduced the predicted resonance structure by a factor of 2. However, that work plus other recent work [4,5], which also consider CI only within the same n complex, are still larger by a factor of about 2 than experiment [3] for resonance energies above 650 eV [7]. These resonances involve captured electron quantum numbers of n 5.…”

“…We also considered CI for all possible 2l 7 3l 3l core configurations. Thus, unlike in [3][4][5][6], here 2s → 3l promotions are included.…”