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Erlangen 2018 – scientific programme

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MO: Fachverband Molekülphysik

MO 12: Cold Molecules and Reactions (joint session MO/A)

MO 12.1: Invited Talk

Tuesday, March 6, 2018, 14:00–14:30, PA 2.150

Towards the study of quantum-state-selected Penning reactionsJonas Grzesiak, Simon Hofsäss, Vivien Behrendt, Frank Stienkemeier, Marcel Mudrich, and •Katrin Dulitz — Institute of Physics, University of Freiburg, Hermann-Herder-Str.3, 79104 Freiburg i.Br., Germany

Our goal is to study quantum-state-controlled Penning collisions between lithium atoms and metastable helium atoms at low collision energies, e.g., to study the influence of electron-spin polarization on the reaction rate and to observe quantum resonance effects. For this, we use an experimental apparatus which consists of a discharge source for the production of metastable helium atomic beams and a magneto-optical trap (MOT) for ultracold lithium atoms. Using a novel multipulse detection scheme, we are able to mass-selectively probe the ionic reaction products at improved energy resolution. In this contribution, I will give an overview of the current state of these experiments. I will also present our progress towards achieving quantum-state selectivity of the reaction partners, which includes optical quenching of the metastable He(21S0) state and magnetic-hexapole focusing of the metastable He(23S1, MJ = 1) state into the MOT target.

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