Hyperfine Relaxation of an Optically Pumped Cesium Vapor

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The relaxation of hyperfine orientation indirectly induced by optical pumping with σ-polarized D1-light in a cesium vapor in the presence of Ar is experimentally studied. The detection technique ensures the absence of quadrupole relaxation contributions in the relaxation signals. The results from the dependences of the hyperfine relaxation rate on the temperature and argon pressure are: diffusion coefficient of Cs in Ar, D 0 = 0.101 ± 0.010 cm2s−1 at 0°C and 760 Torr; relaxation cross section by Cs-Ar collisions, σc = (104 ± 5) × 10−23cm2; relaxation cross section by Cs-Cs (spin exchange) collisions, σex = (1.63 ± 0.13) × 10−14 cm2.

Keywords: Absorption spectroscopy; Inelastic scattering of atoms; Optical pumping

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702864508647

Affiliations: Universidad de Zaragoza, Facultad de Ciencias, Departamento de Optica, 50009 Zaragoza, España

Publication date: July 1, 1986

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