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 are 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 correlation and configuration mixing effects. Combining the present data with other existing ones, we derive an improved semiempirical Z-scaling law for DR resonance strengths as a function of the atomic number, taking into account higher-order relativistic corrections, which are especially relevant for heavy highly charged ions.



Keywords and Phrases

Atoms; Electron resonance; Mercury (metal), Atomic calculations; Dielectronic recombinations; Heidelberg electron beam ion traps; Highly charged ions; Radiative recombination; Relativistic correction; Relativistic electron; Resonance strengths, Ions

International Standard Serial Number (ISSN)

2469-9926; 2469-9934

Document Type

Article - Journal

Document Version

Final Version

File Type





© 2019 American Physical Society (APS), All rights reserved.

Publication Date

01 Jan 2019

Included in

Physics Commons