Table of hyperfine anomaly in atomic systems — 2023

Persson, Jonas

doi:10.1016/j.adt.2023.101589

Cited by 5 publications

(1 citation statement)

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“…[29] on I VIII). It is interesting to mention here that such hyperfine anomalies in neutrals (see [31] for a recent example, and [32] for a general review) can be tools for searching for New Physics, and that the same applies to HCI as well. Lifetime measurements of optical transitions in Mo XXII were reported in [33].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical Ritz–Rydberg analysis of the electronic structure of highly charged ions of lead and bismuth by optical spectroscopy

Rosner,

Rehbehn,

Crespo López-Urrutia

2024

J. Phys. B: At. Mol. Opt. Phys.

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Intra-configuration fine-structure transitions in highly charged ions(HCI) result in most cases from changes in the coupling of equivalent electrons.They are multipole forbidden to varying degrees and often occur within the opticalrange. In HCI with semi-filled nd and nf subshells, electrons can in principlecouple to states which are energetically close but with very different total angularmomenta, e.g. 0 ≤ J ≤ 10. This gives rise to metastable states with verylong lifetimes that exhibit particularly interesting clock transitions or, as in thecase of orbital level crossings, acquire a considerable sensitivity to a possiblevariation of the fine-structure constant α. We investigate both experimentallyand theoretically connecting the ground state and adjacent states of Pb XXIIto Pb XXXIV and Bi X to Bi XV, respectively, covering complex couplings ofelectrons in the 4f and 5d shells. These and others such as nd and nf , whichalso contain equivalent electrons, are of interest for frequency metrology usingquantum logic spectroscopy, for atomic structure and QED theory tests, and forthe search for Dark Matter candidates. We infer their level structure, benchmarkcalculations from two different electronic structure codes, and lay the groundworkfor inferring the wavelengths of forbidden transitions of higher multipolarity inthe optical and VUV region.

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