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arXiv · 2605.29574

Isotope shifts and hyperfine splitting of the ${}^{1}S_{0}\rightarrow{}^{3}P_{1}$ transition in zinc

Felix Waldherr·Lukas Möller·Simon Stellmer
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Abstract

We report laser-induced-fluorescence spectroscopy of the ${}^1S_0 \rightarrow {}^3P_1$ intercombination transition in neutral zinc at $307.6~\mathrm{nm}$. Isotope shifts are measured for all stable isotopes with kHz-level precision, improving previous data by about two orders of magnitude. For $^{67}\mathrm{Zn}$, we resolve the excited-state hyperfine structure and determine $\delta\nu^{67,64}_{\rm COG}=1085.933(7)~\mathrm{MHz}$, $A=608.922(3)~\mathrm{MHz}$, and $B=-18.995(10)~\mathrm{MHz}$. A King plot comparison with the ${}^1S_0 \rightarrow {}^1P_1$ 214-nm transition results in field- and mass-shift parameters of $F_{307.6,214}=1.17(5)$ and $K_{307.6,214}=-153(60)~\mathrm{GHz\ u}$. These results provide the spectroscopic basis for narrow-line cooling and precision measurements based on zinc, including the development of an optical clock.

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Felix Waldherr, Lukas Möller, Simon Stellmer. 2026-05-28. Isotope shifts and hyperfine splitting of the ${}^{1}S_{0}\rightarrow{}^{3}P_{1}$ transition in zinc. https://doi.org/10.1103/51f6-894b

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