Düsseldorf 2007 – scientific programme

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MO: Fachverband Molekülphysik

MO 29: Poster: Cold Molecules

MO 29.8: Poster

Tuesday, March 20, 2007, 16:30–18:30, Poster A

NaK beam experiments: Cold Collision Studies — Andreas Gerdes, Matthias Hobein, •Alexander Stein, Horst Knöckel, and Eberhard Tiemann — Institut für Quantenoptik, Gottfried Wilhelm Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover

Investigation of the potential energy curves (PEC) of singlet and triplet electronic ground states of mixed alkalis allows for the description of cold collisions deriving characteristic properties of the system like scattering lengths or Feshbach resonance positions [1]. Heatpipe measurements were performed as a first approach to the energy structure of the starter molecule NaK. The detailed analysis of the spectra taken in the heatpipe setup will be presented as well as first steps with NaK at a new built beam setup (characterization of the beam conditions). Furthermore first results of experiments supplemental to the heatpipe data will be shown. Most interesting for prediction of scattering properties are the high lying rovibrational levels in the potential to study cold collision spectroscopy as already shown for Na₂ [2]. The next step to the very actual case of KRb (cold molecules produced in a trap) has come into reach.

[1] A. Crubellier et al., Eur. Phys. J. D 6, 211-220 (1999)

[2] O. Docenko et al., J. Phys. B: At. Mol. Opt. Phys. 39 929-943 (2006)