SAMOP 2023 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Poster II
MO 13.7: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Towards state-to-state ion-molecule reaction dynamics — •Tim Michaelsen, Dasarath Swaraj, Florian Trummer, Arnab Khan, Robert Wild, and Roland Wester — Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25/3, A-6020 Innsbruck, Austria
The study of reaction dynamics aims to gain an understanding how chemical reactions occur on an atomistic level. Experiments combining crossed beams with velocity map imaging [VMI] are a powerful tool to observe these dynamics [1]. In the past product state detection for ion-molecule reactions was limited by energy resolution, at least for non-diatomic products [2].
Here we present a new setup, that aims to push the required resolution towards product vibrational state detection in larger systems, which combined with prepared ground state reactants prior to the reactive collision, will let us obtain state-to-state differential cross sections. This is achieved by a newly designed laser-ionization source for H2+ and implementation of a Rydberg-tagging scheme to detect neutral hydrogen atom products in coincidence [3]. First reactions of interest are H2+ + Ne and H2, where interesting quantum dynamics have been predicted and little is known experimentally about the energy partitioning.
[1] J. Meyer, E. Carrascosa, et al. Nat. Chem. 13, 977-981 (2021)
[2] T. Michaelsen, et al., J. Chem. Phys. 147, 013940 (2017)
[3] M. Qiu, et al., Science 311 5766, 1440-1443 (2006)