TY  - GEN
A1  - Rosner, Michael Karl
AV  - public
TI  - Electronic energy level determination in the 4f-subshell in highly charged
lead and the 5d-subshell in highly charged bismuth by atomic structure
calculation-assisted optical spectroscopy
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/35278/
CY  - Heidelberg
ID  - heidok35278
Y1  - 2024///
N2  - fine-structure transitions shift from the infrared to the optical range. The electronic states in nd and nf subshells cover a variety of different total angular momenta, potentially featuring higher-order multipole clock transitions. By utilising laser-induced ablation inside an electron beam ion trap (EBIT), restrictions on elements applicable as HCIs for optical spectroscopy have been
lifted. Optical spectra of Pb21+ to Pb33+ and Bi9+ to Bi14+ were recorded with high resolution thanks to a newly developed algorithm to correct for thermal drifts. These were compared to dedicated atomic structure calculations. Information about the level structure of 4f3 to 5s24f13 in lead and 5d1
to 5d6 in bismuth were inferred.
The presented level structure determinations are valuable as a benchmark
for atomic structure calculations and are an essential step towards
vacuum-ultraviolet spectroscopy in the search for higher-order optical clock
transitions in the examined ions.
ER  -