August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【441】Measurement of the quantum tunneling reaction H$^2$ + D$^- \rightarrow$ HD + H$^-$

Sep 2, 2021, 2:30 PM
Room E

Room E

Talk Atomic Physics and Quantum Optics Atomic Physics and Quantum Optics


Dr Robert Wild (Universität Innsbruck)


Quantum tunneling reactions can play a significant role in chemistry, and hydrogenic systems allow for first-principles calculations. The rate of the tunneling reaction H$^2$ + D$^- \rightarrow$ HD + H$^-$, for which the collision complex is closely related to the H$^-_3$ anion, has been calculated but has lacked verification. Here we present high-sensitivity measurements of the reaction rate carried out in a cryogenic 22-pole ion trap. We model the effect of a high-energy tail in the velocity distribution to investigate its influence on the reaction rate. Our measured value agrees with quantum tunneling calculations, serving as a benchmark for molecular theory.

Primary author

Dr Robert Wild (Universität Innsbruck)


Mr Markus Nötzold (Universität Innsbruck) Mr Malcolm Simpson (Universität Innsbruck) Prof. Roland Wester (Universität Innsbruck)

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