Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 22: Cold Molecules II

MO 22.2: Vortrag

Donnerstag, 11. März 2010, 14:15–14:30, F 142

High resolution spectroscopy of excited Rb2 molecules — •christoph strauss1, tetsu takekoshi2, florian lang2, marius lysebo3, leif veseth3, eberhard tiemann4, rudolf grimm2,5, and johannes hecker denschlag1,21Institut für Quantenmaterie der Universität Ulm, D-89081 Ulm, Germany — 2Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, A-6020 Innsbruck, Austria — 3AlbaNova University Center Atomic-Molecular Physics S-106 91 Stockholm Sweden — 4Gottfried Wilhelm Leibniz Universität Hannover, D-30167 Hannover, Germany — 5Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, A-6020 Innsbruck, Austria

Even today, understanding the hyperfine structure of excited alkali dimers can be quite a challenge. We carry out precision spectroscopy on excited ultracold Rb2 molecules which are deeply bound in the 3Σg(5S1/2+5P1/2) triplet potential. By irradiating a sample of 3x104 Rb2 Feshbach molecules in an optical lattice with a widely tunable laser we detect excited bound levels through molecular loss. We fully resolve vibrational, rotational, hyperfine, and Zeeman structure. Using a model calculation a large fraction of the observed lines can be attributed to specific states and quantum numbers. However, for higher rotational quantum numbers systematic deviations occur which cannot be explained yet. A good understanding of the molecular structure is important for an optimized population transfer in various deeply bound states. Our results call for further research in this direction.

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