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Frankfurt 2006 – scientific programme

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MO: Molekülphysik

MO 57: Poster: Cold Molecules

MO 57.7: Poster

Thursday, March 16, 2006, 16:30–18:30, Labsaal

A two-species experiment for ultracold chemistry — •Leif Vogel1, Christian Giese1, Benjamin Müller1, Jörg Lange1, Stephan Kraft1, Peter Staanum1,2, Roland Wester1, and Matthias Weidemüller11Physikalisches Institut Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover

The study of atom-molecule interactions at very low temperature has opened possibilities in the field of ultracold chemistry. In this context we are particularly interested in the exchange reaction LiCs + Cs ↔ Li + Cs2.
We form Cs2 by photoassociation in a quasi electrostatic optical trap and aim at forming LiCs in the same way. In our recent experiments Cs-Cs2 collision rates at ultracold temperatures were found to be largely independent of their rotational and vibrational excitation[1]. In contrast, for ultracold exchange reactions the molecular binding energies and reaction barriers are expected to play an important role. We present our experiment aiming at the efficient production of cold molecules at high densities and discuss the prospects of studying state-resolved reactive scattering in the quantum collision regime.

[1] P. Staanum et al. arXiv:physics/0509123 (Phys. Rev. Lett. in press)

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