Atom-molecule collisions in an optically trapped gas
Abstract
Cold inelastic collisions between confined cesium (Cs) atoms and Cs\2 molecules are investigated inside a CO\2 laser dipole trap. Inelastic atom-molecule collisions can be observed and measured with a rate coefficient of 2.5 × 10-11 cm3 s-1, mainly independent of the molecular ro-vibrational state populated. Lifetimes of purely atomic and molecular samples are essentially limited by rest gas collisions. The pure molecular trap lifetime ranges 0,3-1 s, four times smaller than the atomic one, as is also observed in a pure magnetic trap. We give an estimation of the inelastic molecule-molecule collision rate to be 10-11 cm3 s-1.
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