Fe${}^{15+}$ dielectronic recombination and the effects of configuration interaction between resonances with different captured electron principal quantum number

Abstract

Dielectronic recombination (DR) of Na-like Fe${}^{15+}$ forming Mg-like Fe${}^{14+}$ via excitation of a $2l$ core electron has been investigated. We find that configuration interaction (CI) between DR resonances with different captured electron principal quantum numbers $n$ can lead to a significant reduction in resonance strengths for $n\ge 5$. Previous theoretical work for this system has not considered this form of CI. Including it accounts for most of the discrepancy between previous theoretical and experimental results.

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• Storage ring measurement of the C IV recombination rate coefficient