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- Title
Particularities of optical pumping effects in cold and ultra-slow beams of Na and Cs in the case of cyclic transitions.
- Authors
Bruvelis, M.; Cinins, A.; Leitis, A.; Efimov, D.; Bezuglov, N.; Chirtsov, A.; Fuso, F.; Ekers, A.
- Abstract
The time-dependent population dynamics of hyperfine (HF) levels of n p states is examined for cyclic transitions in alkali atoms. We study a slow and cold atomic beam of Na ( n = 3) and Cs ( n = 6), taking into account the long interaction time of light with atoms (~200 μs) inside the resonant laser beam. Simple analytical expressions for the populations of the excited states and for the intensities of the absorption lines are derived for a three-level system model. We show that at moderate pump laser power the mixing of HF levels is sufficient to form a flow of population from a cyclic transition to partially open transitions. We discuss various phenomena associated with the evolution of optical pumping that cannot be explained by general analysis of two-level system model.
- Subjects
OPTICAL pumping; ULTRA-slow processes; PHASE transitions; POPULATION dynamics; HYPERFINE structure; ATOMIC beams; MIXING
- Publication
Optics & Spectroscopy, 2015, Vol 119, Issue 6, p1038
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/S0030400X1512005X