Resonance strengths for KLL dielectronic recombination of highly charged mercury ions and improved empirical $\mathbf{Z}$-scaling law

Abstract

Theoretical and experimental resonance strengths for KLL dielectronic recombination (DR) into He-, Li-, Be-, and B-like mercury ions are presented, based on state-resolved DR x-ray spectra recorded at the Heidelberg electron beam ion trap. The DR resonance strengths were experimentally extracted by normalizing them to simultaneously recorded radiative recombination signals. The results are compared to state-of-the-art atomic calculations that include relativistic electron-electron correlation and configuration mixing effects. Combining the present data with other existing ones, we derive an improved semi-empirical $Z$-scaling law for DR resonance strength as a function of the atomic number, taking into account higher-order relativistic corrections, which are especially relevant for heavy highly charged ions.

11 pages, 4 figures, accepted to Phys. Rev. A

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Cited by in corpus (3)

• Observation of strong two-electron--one-photon transitions in few-electron ion
• Dielectronic recombination studies of ions relevant to kilonovae and non-LTE plasma
• Dielectronic recombination studies on Fe${}^{2+}$