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 molecules — Christoph Strauss¹, Tetsu Takekoshi¹, •Florian Lang¹, Rudolf Grimm^1,2, and Johannes Hecker Denschlag¹ — ¹Institut 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 a³Σ_u⁺ 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 a³Σ_u⁺ 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)