RELAXATION OF POPULATIONS IN HYPERFINE ZEEMAN SUBLEVELS OF THE GROUND-STATE OF OPTICALLY PUMPED CS IN A HIGH MAGNETIC-FIELD

Cs vapor was optically pumped with a diode laser in a magnetic field o f 1.516 T. The relaxation of the population imbalance in the hyperfine Zeeman sublevels of the ground state was detected with an another dio de laser. There were different population evolutions in different hype rfine Zeeman sublevels of optically pumped Cs and the relaxation trans ients had 'anomalous' shapes. It was found that the combined electron spin-nuclear spin transition caused the 'anomalous' shapes of the tran sients. We deduced the transition rates between the sublevels of the g round state from the transients. The transients required a 'non-unifor m' model of collision relaxation on the cell wall in the rate-equation calculation.