Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantengase: Gitter und Tunneln I
Q 47.2: Vortrag
Donnerstag, 5. März 2009, 14:15–14:30, Audi-A
Collisional properties of metastable neon in different internal states — •Jan Schütz, Jonas Keller, Matthias Euler, Norbert Herschbach, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt
We measured the scattering lengths of laser-cooled neon atoms in the metastable state 3P2 for the bosonic isotopes 20Ne and 22Ne and the suppression of two-body losses due to spin-polarization. After implementing a dipole trap, we determined the two-body loss coefficients of both isotopes in the second metastable state 3P0. In all cases the good-to-bad ratios are found to be too low for efficient evaporative cooling without modification of the collisional properties.
We currently investigate the possibility to coherently control collisional interactions by preparing the atoms in superposition states of different magnetic sublevels of the 3P2 state. We are therefore implementing a STIRAP scheme between the 3P0 and 3P2 states. We report on the status of the experiment.