Observation of a shape resonance in cold-atom scattering by pulsed photoassociation

H.M.J.M. Boesten, C.C. Tsai, B.J. Verhaar, D.J. Heinzen

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    We observe the time dependence of a cold-atom collision in a pulsed photoassociation experiment. For a g-wave shape resonance in the 85Rb+85Rb system we measure the time needed to build up the resonant state by tunneling through the centrifugal barrier. Combining this with time-independent 85Rb and 87Rb photoassociation we determine the resonance energy and find evidence for the decay of the shape resonance into inelastic channels. We also determine the 85Rb+85Rb and 87Rb+87Rb C6 coefficient and triplet scattering lengths without relying on ab initio calculations.
    Original languageEnglish
    Pages (from-to)5194-5197
    Number of pages4
    JournalPhysical Review Letters
    Issue number26
    Publication statusPublished - 1996


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