Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 24: Cold Molecules and Reactions (joint session MO/A)

A 24.2: Talk

Tuesday, March 6, 2018, 14:30–14:45, PA 2.150

Reactive scattering between metastable helium atoms and ultracold lithium atoms — •Jonas Grzesiak¹, Vivien Behrendt¹, Frank Stienkemeier¹, Marcel Mudrich², and Katrin Dulitz¹ — ¹Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str.3, 79104 Freiburg i.Br. — ²Department of Physics and Astronomy, Ny Munkegade 120, 8000 Aarhus C, DK

The experimental observation of quantum effects in Penning ionization reactions has recently attracted a lot of attention [1]. Our goal is to study such processes in a quantum-state-controlled manner at low collision energies, e.g., to study the influence of electron-spin polarization on the reaction rate. For this, we use an experimental setup which is composed of a magneto-optical trap for ultracold lithium atoms and a discharge source for the production of supersonic beams of metastable helium atoms. In this contribution, we will present a novel detection scheme which allows for the mass-selected detection of the ionic reaction products at improved energy resolution and we will discuss the influence of elastic collisions on the reaction rate measurements.

[1] A. B. Henson, S. Gersten, Y. Shagam, J. Narevicius, E. Narevicius, Science 338, 234 (2012).