Velocity preserving transfer between highly excited atomic states: Black Body Radiation and Collisions

Autor:	Carvalho, J. C. de Aquino, Maurin, I., Failache, H., Bloch, D., Laliotis, A.
Rok vydání:	2021
Předmět:	Physics - Atomic Physics Quantum Physics
Druh dokumentu:	Working Paper
Popis:	We study the excitation redistribution from cesium $7\mathrm{P}_{1/2}$ or $7\mathrm{P}_{3/2}$ to neighboring energy levels by Black Body Radiation (BBR) and inter atomic collisions using pump-probe spectroscopy inside a vapor cell. At low vapor densities we measure redistribution of the initial, velocity-selected, atomic excitation by BBR. This preserves the selected atomic velocities allowing us to perform high resolution spectroscopy of the $\mathrm{6D\rightarrow 7F}$ transitions. This transfer mechanism could also be used to perform sub-Doppler spectroscopy of the cesium highly-excited $\mathrm{nG}$ levels. At high densities we observe interatomic collisions redistributing the excitation within the cesium $\mathrm{7P}$ fine and hyperfine structure. We show that $\mathrm{7P}$ redistribution involves state-changing collisions that preserve the initial selection of atomic velocities. These redistribution mechanisms can be of importance for experiments probing high lying excited states in dense alkali vapor. Comment: accepted for publication in Journal of Physics B: Atomic, Molecular and Optical Physics
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2101.07893 Zobrazit plný text záznamu View this record from Arxiv