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

2021/01/19 by Carvalho, J. C. de Aquino, Maurin, I., Failache, H. +2
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2101.07893

Abstract

We study the excitation redistribution from cesium 7P_1/2 or 7P_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 6D→ 7F transitions. This transfer mechanism could also be used to perform sub-Doppler spectroscopy of the cesium highly-excited nG levels. At high densities we observe interatomic collisions redistributing the excitation within the cesium 7P fine and hyperfine structure. We show that 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.

Related

• Sub-Doppler spectroscopy of Rydberg atoms via velocity selection memory in a hot vapor cell
• High precision measurement of the hyperfine splitting and ac Stark shift of the 7d ²D_3/2 state in atomic cesium
• Measuring the hyperfine splittings and deriving the hyperfine-interaction constants of Cesium 7D 5/2 excited state
• Two-color modulation transfer spectroscopy
• Hyperfine spectroscopy using co-propagating pump-probe beams