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Ab initio calculations of the electronic structure of Ac
Genevieve Geehan, Marten Luit Reitsma, Johan David Polet +3
Accurate spectroscopic investigations of the heaviest elements are inherently challenging, due to their short lifetimes and low production yields. Success of such measurements requ…
Long-lived metastable states in the 4f5d6s configuration of Yb
Z. E. D. Ackerman, A. Cadarso Quevedo, Ilango Maran +4
We study the occurrence of long-lived metastable states in the 4f5d6s electron configuration of Yb. By optical pumping of a single trapped ion on the $^2F^\text{o}_{7/2}…
Resolving the Blueshift in Calculations of the EUV Spectrum of Multiply Charged Tin Ions
M. L. Reitsma, J. Sheil, O. O. Versolato +2
We report ab initio relativistic calculations on the complex open shell Sn highly charged ion, a prototypical plasma ion relevant for extreme ultraviolet (EUV) nanolithogra…
Second-order hyperfine structure and its impact on new physics searches using isotope shift spectroscopy
Julian C. Berengut, Natalia S. Oreshkina
Recent precision isotope shift spectroscopy experiments have reported King plot non-linearities that may uncover previously hidden nuclear properties or hint at new force-carrying…
Probing new bosons and nuclear structure with ytterbium isotope shifts
Menno Door, Chih-Han Yeh, Matthias Heinz +24
In this Letter, we present mass-ratio measurements on highly charged Yb ions with a precision of and isotope-shift measurements on Yb on the …
Nonlinear calcium King plot constrains new bosons and nuclear properties
A. Wilzewski, L. I. Huber, M. Door +39
Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence of beyond-Standard-Model (BSM) interactions that couple electrons and neutrons. However, it is cru…