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Hamburg 2009 – scientific programme

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MO: Fachverband Molekülphysik

MO 13: Molekülphysik Poster 1

MO 13.40: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 8 Foyer

Spectroscopy of Rb2 triplet moleculesChristoph Strauss1, Tetsu Takekoshi1, •Florian Lang1, Rudolf Grimm1,2, and Johannes Hecker Denschlag11Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck — 2Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften

We have recently reported [1] the production of an ultracold gas of tightly bound Rb2 triplet molecules in the rovibrational ground state, close to quantum degeneracy. This was achieved by optically transferring weakly bound Rb2 molecules to the absolute lowest level of the a3Σu+ triplet electronic ground state potential. The implementation of such a transfer requires detailed knowledge about the molecular level structure, which previously was experimentally unexplored.

Here we present detailed results from Raman spectrometry of the a3Σu+ potential. We have surveyed the progression of vibrational levels from the last bound state (v=40) to the vibrational ground state v=0. We have further resolved the hyperfine structure of the different vibrational levels and find good agreement with close-coupled channel model calculations.

[1] F. Lang et al., Phys. Rev. Lett. 101, 133005 (2008)

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