Hannover 2010 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster II
Q 55.30: Poster
Thursday, March 11, 2010, 16:00–19:00, Lichthof
Properties of ultracold ground state LiCs molecules — •Marc Repp1, Johannes Deiglmayr1,2, Anna Grochola3, Olivier Dulieu4, Roland Wester2, and Matthias Weidemüller1 — 1Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg — 2Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 3Institute of Experimental Physics, University of Warsaw — 4Laboratoire Aimé Cotton, CNRS, Orsay
Recently we achieved the formation of LiCs molecules in the lowest levels of the ground state by photoassociation (PA) [1]. These molecules are of particular interest due to their large permanent electric dipole moment. We will present a first experimental measurement of this dipole moment. We will further present the first trapping of ultracold LiCs molecules. The molecules are formed and trapped in a quasi electrostatic trap (QUEST) formed by single-focused CO2 laser. We determine the lifetime of molecules in the trap to be τ=24(3) s, limited by collisions with background gas. Rate coefficients for inelastic collisions between LiCs molecules and cesium atoms in the QUEST are measured to be between β=1.1×10−10cm3/s and 2.4×10−10cm3/s, depending on the PA resonance used for the formation of the molecules.
[1] J. Deiglmayr et al., Phys. Rev. Lett. 101, 133004 (2008).