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MO: Fachverband Molekülphysik
MO 16: Posters 3: Experimental Techniques and Theoretical Approaches
MO 16.15: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG1
Stochastic Wavepacket Approach to Modelling Penning Ionisation — •Alexander Blech1, Daniel M. Reich1, Edvardas Narevicius2, and Christiane P. Koch1 — 1Universität Kassel, Deutschland — 2Weizmann Institute of Science, Rehovot, Israel
Cold Penning ionisation reactions of metastable helium display sharp tunneling resonances. In this regime the reactants can be described by a modicum of partial waves with one dominant one, when the collision energy matches a resonance [1,2].
Recently, the products of the Penning ionisation reaction have been detected using VMI. For Ar colliding with He*, an additional ring is observed which is absent for Kr. This situation can be attributed to the spin-orbit interaction. However, the angular dependence is more isotropic than one would expect. We therefore model the ionisation process using a stochastic wavepacket approach and calculate the cross section in the exit channels.
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Klein et al., Nat. Phys., doi:10.1038/nphys3904, (2016).