Stuttgart 2012 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 4: Cold Molecules I

MO 4.2: Vortrag

Montag, 12. März 2012, 14:15–14:30, V38.03

Low energy rare gas - alkali scattering experiments — •Matthias Strebel, Bernhard Ruff, Marcel Mudrich, and Frank Stienkemeier — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg

In order to investigate reactive and non reactive collisions between atoms and molecules at very low scattering energies, a magneto-optical trap (MOT) for ultracold ⁷Li atoms is combined with a rotating nozzle setup for producing slow beams of cold molecules. Studying reactive scattering processes with collision energies down to 1 meV, we expect to get insight into the quantum mechanical nature of cold reactions.

First measurements of differential and integrated cross sections of elastic collisions with rare gases already show interesting features like rainbow scattering or glory undulations. The suitability of a MOT as a scattering target for low-energy collision experiments with regard to the particular kinematics resulting from a resting target and diagnostics such as fluoresence imaging as a measure for integral cross sections is discussed.