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arXiv · 2403.18796

Absolute frequency measurement of the 5s5p $^1P_1$ - 5s5d $^1D_2$ transition in strontium

Ana Cipriš·Ivana Puljić·Damir Aumiler·Ticijana Ban·Neven Šantić
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Abstract

We report on the absolute frequency determination of the 5s5p $^1P_1$ - 5s5d $^1D_2$ transition in atomic strontium, achieved through frequency comb-referenced laser-induced-fluorescence (LIF) spectroscopy. We excite the 5s$^2$ $^1S_0$ - 5s5p $^1P_1$ transition using an on-resonance laser at $\approx$461 nm, and then measure the variation in the LIF signal while scanning the laser at $\approx$767 nm across the 5s5p $^1P_1$ - 5s5d $^1D_2$ transition. We determine the absolute frequency of $390599571.7\pm0.4$ MHz, with an accuracy that surpasses the previous most accurate measurement by two orders of magnitude. This measurement technique can be readily applied for precision spectroscopy of high-lying states not only in strontium, but also in other atomic species.

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Ana Cipriš, Ivana Puljić, Damir Aumiler, Ticijana Ban, Neven Šantić. 2024-03-27. Absolute frequency measurement of the 5s5p $^1P_1$ - 5s5d $^1D_2$ transition in strontium. https://doi.org/10.1016/j.sab.2024.106942

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