Two-photon photoassociative spectroscopy of ultracold 88-Sr
Abstract
We present results from two-photon photoassociative spectroscopy of the least-bound vibrational level of the X1g+ state of the 88Sr2 dimer. Measurement of the binding energy allows us to determine the s-wave scattering length, a88=-1.4(6) a0. For the intermediate state, we use a bound level on the metastable 1S0-3P1 potential, which provides large Franck-Condon transition factors and narrow one-photon photoassociative lines that are advantageous for observing quantum-optical effects such as Autler-Townes resonance splittings.
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