Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Posters 1: Cold Molecules, High Resolution Spectroscopy, and Theory
MO 10.7: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Foyer LLM
Observation of cold dipolar collisions and electrostatic trapping of centrifuge decelerated molecules — •Manuel Koller, Thomas Gantner, Florian Jung, Isabel Rabey, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institute of Quantum Optics, Garching, Germany
Dense samples of cold polar molecules provide fascinating research possibilities in physics and chemistry. By combining cryogenic buffer gas cooling and centrifuge deceleration we recently demonstrated a record high flux exceeding 1010s−1 and densities up to 109cm−3 of cold polar molecules at kinetic energies corresponding to less than 1K [1]. This allows the observation of cold molecule-molecule collisions for CH3F and ND3. The low absolute velocity enables the straightforward loading of molecules into an electrostatic trap [2], making much more detailed collision studies possible due to longer interaction times. Beyond the observation of inelastic collisions, the creation of highly nonthermal energy distributions by sharply cutting away hotter molecules with a radio frequency knife should allow the investigation of rethermalization via elastic collisions.
[1] X. Wu et al., Science 2017, 358, 645-648
[2] B.Englert et al., Physical Review Letters 2011, 106, 263003