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arXiv · 2501.07395

Lifetime measurement of the 5s5p 1P1 state in strontium

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

We present a direct lifetime measurement of the $5s5p~^1P_1$ state of strontium using time-correlated single-photon counting of laser induced fluorescence in a hot atomic beam. To achieve fast switch-off times and a high signal-to-noise ratio, we excite the strontium atoms with a femtosecond pulsed laser at $\approx$461 nm and collect the fluorescence onto a hybrid single-photon detector. Analysis of the measured exponential decay gives a lifetime of the $^1P_1$ state of $\tau = (5.216 \pm 0.006_{stat} \pm 0.013_{sys})$ ns, where all the systematic effects have been thoroughly considered.

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Ivana Puljić, Ana Cipriš, Damir Aumiler, Ticijana Ban, Neven Šantić. 2025-01-13. Lifetime measurement of the 5s5p 1P1 state in strontium. https://doi.org/10.1103/physreva.111.032809

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