Recently, several groups,1-4 have used photoassociation of ultracold atoms to study transitions from free atoms to bound molecules. Photoassociative spectroscopy involves illuminating a collection of laser cooled and trapped atoms with a tunable probe laser. When the probe laser is resonant with transition to an excited molecular state, molecules are formed and detected either by ionizing the molecules or by monitoring changes in the number of trapped atoms.

May 8, 19944 citations

Verhandlungen der Deutschen Physikalischen Gesellschaft

Recoil spectroscopy with laser-cooled trapped Na-atoms

Jan Willem Turkstra, R. Hoekstra, Steven Knoop, Reinhard Morgenstern, Dirk Carl Meyer

Published Jan 1, 2001• 0 citations

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We report an experiment on recoil-ion momentum spectroscopy of

{\mathrm{Rb}}^{+}

ions formed by two-photon ionization of

{\mathrm{Rb}}^{2}{P}_{3/2}

at 790 nm. Laser-cooled atoms in a magneto-optic trap are used as the target in time-of-flight analysis of the recoil momentum. We demonstrate a resolution of 1 \ensuremath{\mu}eV with a limiting momentum resolution below $\ensuremath{\delta}p=0.05$ a.u. We also show the use of the photoionization technique for the characterization of cold atomic samples.