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Formation of ultracold metastable Rb2 molecules in their v"=0 level by blue-detuned photoassociation

By M. A. Bellos, D. Rahmlow, R. Carollo, J. Banerjee, O. Dulieu, A. Gerdes, E. E. Eyler, P. L. Gould and W. C. Stwalley


We report on the observation of blue-detuned photoassociation in Rb2, in which vibrational levels are energetically above the corresponding excited atomic asymptote. 85Rb atoms in a MOT were photoassociated at short internuclear distances to levels of the (1)3Pi g state at a rate of approximately 5x10^4 molecules/s. We have observed most of the predicted vibrational levels for all four spin-orbit components 0g+, 0g-, 1g, and 2g, including levels of the 0g+ outer well. These molecules decay to the metastable a3Sigma u+ state, some preferentially to the v"=0 level, as we have observed for photoassociation to the v'=8 level of the 1g component.Comment: Submitted to Physical Chemistry Chemical Physic

Topics: Physics - Atomic Physics, Physics - Chemical Physics
Year: 2011
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