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arXiv · 2405.05084

Transition frequencies, isotope shifts, and hyperfine structure in $4s \rightarrow 4p$ transitions of Ti$^+$ ions

Tim Ratajczyk·Kristian König·Philipp Bollinger·Tim Lellinger·Victor Varentsov·Wilfried Nörtershäuser·Julien Spahn
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Abstract

We have measured transition frequencies, isotope shifts and hyperfine structure splittings in the $3 d^{2}\left({ }^{3\!}F\right) 4 s\,{ }^{4} F_J\rightarrow 3 d^{2}\left({ }^{3\!} F\right) 4 p \,^{4} G_{J+1}$ transitions in Ti$^+$ ions for $J=\frac{3}{2},\, \frac{5}{2},\, \frac{7}{2}$ using collinear laser spectroscopy. Ions were generated by laser ablation in a buffer gas atmosphere and extracted into vacuum through a nozzle and a pair of radiofrequency (RF) funnels. The obtained results are of interest as reference values for on-line measurements of short-lived titanium isotopes and for astrophysical searches for temporal or spatial variations of the fine structure constant $\alpha$ using quasar absorption spectra.

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Tim Ratajczyk, Kristian König, Philipp Bollinger, Tim Lellinger, Victor Varentsov, Wilfried Nörtershäuser, Julien Spahn. 2024-05-08. Transition frequencies, isotope shifts, and hyperfine structure in $4s \rightarrow 4p$ transitions of Ti$^+$ ions. https://doi.org/10.1103/physreva.110.032807

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