Cold inelastic collisions between lithium and cesium in a two-species magneto-optical trap

Details Cold inelastic collisions between lithium and cesium in a two-species magneto-optical trap Cold inelastic collisions between lithium and cesium in a two-species magneto-optical trap

1999-02-20

arxiv.org/abs/physics/9902058v1

Eur. Phys. J. D 7, 331-340 (1999)

Physics

Atomic Physics

submitted to Euro. Phys. J. D, special issue on Laser Cooling and Trapping

Scientific paper

10.1007/s100530050576

We investigate collisional properties of lithium and cesium which are simultaneously confined in a combined magneto-optical trap. Trap-loss collisions between the two species are comprehensively studied. Different inelastic collision channels are identified, and inter-species rate coefficients as well as cross sections are determined. It is found that loss rates are independent of the optical excitation of Li, as a consequence of the repulsive Li$^*$-Cs interaction. Li and Cs loss by inelastic inter-species collisions can completely be attributed to processes involving optically excited cesium (fine-structure changing collisions and radiative escape). By lowering the trap depth for Li, an additional loss channel of Li is observed which results from ground-state Li-Cs collisions changing the hyperfine state of cesium.

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