Measurement of three-body recombination coefficient of ultracold lithium and strontium atoms
Abstract
We report on the observation of a conspicuous loss in an ultracold mixture of 7Li and 88Sr atoms confined in a far-off-resonance optical dipole trap. We attribute the trap loss to the three-body inelastic Li-Sr-Sr collision and extract the corresponding three-body recombination coefficient K3 at T 18.5,45,70,600 μ K. The measured three-body recombination coefficient is about two to three orders of magnitude larger than the typical values convenient for realizing quantum degenerate gases. It also indicates a potentially large s-wave scattering length between the bosonic 7Li and 88Sr atoms, and essentially rules out the prospect of realizing 7Li and 88Sr mixtures of high phase space density.
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