Volume 120, Number 4, November 2017
|Number of page(s)||5|
|Section||Atomic, Molecular and Optical Physics|
|Published online||05 February 2018|
Influence of optical pumping on the transverse spin relaxation of Cs atoms in different ground-state hyperfine levels
College of Optoelectronic Science and Engineering, National University of Defense Technology Changsha 410073, China
Received: 4 November 2017
Accepted: 17 January 2018
The influence of optical pumping on the transverse spin relaxation of 133Cs atoms in different ground-state hyperfine levels is investigated. Transverse relaxation times for 133Cs atoms in the two ground-state hyperfine levels are detected separately under different intensities and frequencies of pump light, and a statistical model is adopted to analyze the experimental results. Theory and experiment show that optical pumping changes the populations of the two ground-state hyperfine levels, thereby influencing the transverse spin relaxation due to spin-exchange collisions. As a result, an unusual phenomenon that the transverse relaxation time for 133Cs atoms in the upper ground-state hyperfine level increases with the pump-light intensity is observed.
PACS: 32.80.Xx – Level crossing and optical pumping / 33.35.+r – Electron resonance and relaxation
© EPLA, 2018
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