Erlangen 2022 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 15: Poster 2
MO 15.21: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Towards laser ionisation of H-atoms for kinematically complete coincidence imaging of ion-molecule reactions — •Florian Trummer, Dasarath Swaraj, Tim Michaelsen, Arnab Khan, and Roland Wester — Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
Crossed-beam velocity map imaging (VMI) has proven to be a powerful tool to gain insight into atomistic reaction mechanisms [1-3]. Here we will present concepts and simulations for a new experimental setup that uses coincidence detection of reaction products for a kinematically complete VMI study of certain reaction types, involving neutral hydrogen products. Instead of solely detecting the charged initial product of the reactive encounter, a high power and high repetition rate Lyman-alpha source in combination with a UV laser will be used to ionise the neutral H-atoms, which are a product of the chemical reactions under study (e.g., O− + H2 → OH− + H). We will present the planned laser setup for our upcoming project which is currently under construction. The search for quantum resonances in vibrational state-resolved spectroscopic studies of ion-neutral reactions is among the goals that shall be explored in the future.
[1] R. Wester, Phys. Chem. Chem. Phys. 16, 396 (2014)
[2] M. Stei et al., Nature Chemistry 8.2, 151-156 (2016)
[3] T. Michaelsen et al., J. Phys. Chem. Lett. 11.11, 4331-4336 (2020)