Spectra and Autoionization Lifetimes of Long-Range Rydberg Molecular States of $^{85}$ Rb $_2$ Spectra and Autoionization Lifetimes of Long-Range Rydberg Molecular States of $^{85}$Rb$_2$

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Measurements of single-state and state-ensemble lifetimes of high-lying Rb Rydberg levels

Matteo Archimi, Cristiano Simonelli, Lucia Di Virgilio +7 more

We demonstrate a hybrid method based on field ionization and state-selective deexcitation capable of measuring the lifetimes of high-lying Rydberg levels. For $nS$ Rydberg states of Rb atoms with principal quantum number $60\ensuremath{\le}n\ensuremath{\le}88$, we measure both the lifetimes of single target states and those of the ensembles of Rydberg states populated via blackbody-radiation-induced transitions. We find good overall agreement with numerical calculations of the expected lifetimes in both cases. However, for the target-state lifetimes, we find a local deviation towards shorter lifetimes for states around $n=72$ , which we interpret as a signature of a modified blackbody spectrum in the finite volume in which our experiments take place.We demonstrate a hybrid method based on field ionization and state-selective deexcitation capable of measuring the lifetimes of high-lying Rydberg levels. For $nS$ Rydberg states of Rb atoms with principal quantum number $60\ensuremath{\le}n\ensuremath{\le}88$, we measure both the lifetimes of single target states and those of the ensembles of Rydberg states populated via blackbody-radiation-induced transitions. We find good overall agreement with numerical calculations of the expected lifetimes in both cases. However, for the target-state lifetimes, we find a local deviation towards shorter lifetimes for states around $n=72$, which we interpret as a signature of a modified blackbody spectrum in the finite volume in which our experiments take place.

arXiv:1907.01254Physical Review ASep 4, 201924 citations

Spectra and Autoionization Lifetimes of Long-Range Rydberg Molecular States of

^{85}

_2

We demonstrate a hybrid method based on field ionization and state-selective deexcitation capable of measuring the lifetimes of high-lying Rydberg levels. For

nS

Rydberg states of Rb atoms with principal quantum number $60\ensuremath{\le}n\ensuremath{\le}88$, we measure both the lifetimes of single target states and those of the ensembles of Rydberg states populated via blackbody-radiation-induced transitions. We find good overall agreement with numerical calculations of the expected lifetimes in both cases. However, for the target-state lifetimes, we find a local deviation towards shorter lifetimes for states around

n=72

, which we interpret as a signature of a modified blackbody spectrum in the finite volume in which our experiments take place.