Dresden 2011 – scientific programme
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MO: Fachverband Molekülphysik
MO 6: Poster: Cold Molecules
MO 6.5: Poster
Monday, March 14, 2011, 16:00–18:00, P1
Fourier Transform spectroscopy and potential energy curve of the ground state X1Σ+ of NaLi — •Michael Steinke, Horst Knöckel, and Eberhard Tiemann — Centre for Quantum Engineering and Space Time Research (QUEST) und Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover
Investigation of the spectra of diatomic alkali molecules and the spectroscopic observations on singlet and triplet ground states together with Feshbach resonances from cold collisions has turned out to be a useful toolbox for describing and predicting properties of such cold collisions. We report here on a revised description of the ground state X1Σ+ of NaLi. Compared to previous investigations (C.E. Fellows, J. Chem. Phys. 94, 5855 (1991)) we were able to extend the data set to levels closer to the atomic asymptote. In contrast, we were not successful finding excitations by which the triplet ground state could be accessed via fluorescence, mainly due to unfavorable Franck-Condon factors and small spin-orbit interaction of Li. Thus a combined modeling of singlet and triplet ground state is not yet possible. The state of the investigations will be presented.