Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 53: SYCM: Contributed posters for the Symposium Hot topics in cold molecules: From laser cooling to quantum resonances

Q 53.1: Poster

Donnerstag, 12. März 2020, 16:30–18:30, Empore Lichthof

Single-source merged-beam experiment for the study of reactive collisions — •Marco van den Beld Serrano, Frank Stienkemeier, and Katrin Dulitz — University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg i. Br., Germany

We present an original merged-beam method for studying reactive collisions between two atomic or molecular species by the use of two gas pulses emerging from a single supersonic beam source. Our approach, which relies on the laser cooling and deceleration of a laser-coolable species inside a Zeeman slower, can be used for a wide range of scattering studies at thermal and at cold collision energies. A possible experimental implementation of the proposed method is outlined for autoionizing collisions between helium atoms in the metastable triplet state and a second, atomic or molecular species. Using numerical trajectory calculations, we provide estimates of the expected efficiency, the collision-energy range and the energy resolution of the approach. In addition to that, we have experimentally tested the feasibility of such an experiment by producing two gas pulses at very short time intervals, and the results of these measurements are detailed as well.