Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Poster 2: Biomolecules, Cold Molecules, Experimental Techniques, Various Topics
MO 19.9: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Finding pathways for creation of cold molecules by laser spectroscopy — •Ivo Temelkov1, Horst Knöckel2, and Eberhard Tiemann2 — 1Sofia University — 2Leibniz Universität Hannover
Creation of ultracold molecules in a single rovibrational level of their ground state is a hot topic presently, because of fascinating new experiments employing molecular properties like electric and magnetic moments, which give rise to anisotropic long range interactions. Creation of such molecules starts with ultracold samples of atoms and applying external magnetic and laser fields for forming Feshbach molecules and by a subsequent coherent processes like STIRAP transferring to the desired quantum state, the absolute ground state of the molecule. However, for predicting efficient pathways in the molecular level system, detailed knowledge on the ground and excited molecular states is required. We will go the opposite way by a spectroscopy experiment. with the help of a molecular beam apparatus, exploring possible pathways for creation of cold NaK molecules. Starting from hot molecules in the X1Σ+ ground state, we excite them in a STIRAP sequence via a selected upper level, which connects by resonance coupling singlet and triplet states opening the path to weakly bound levels, ideally to Feshbach molecules of the coupled system a3Σ+-X1Σ+. We model this process with the knowledge of earlier spectroscopic work and report about the status of the experimental realization.