Cold inelastic collisions between lithium and cesium in a two-species magneto-optical trap |
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Authors: | U. Schlöder H. Engler U. Schünemann R. Grimm M. Weidemüller |
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Affiliation: | (1) Max-Planck-Institut für Kernphysik, 69029 Heidelberg, Germany, DE |
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Abstract: | 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. Received 28 December 1998 and Received in final form 16 February 1999 |
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Keywords: | PACS. 34.50.Rk Laser-modified scattering and reactions - 32.80.Pj Optical cooling of atoms trapping |
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