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Characterization of Dynamical Resonances using cryo-SEVI Transition State Spectroscopy

Michael Bowman
Michael Bowman
Chemistry Building, Room 400
Physical Seminar


Dynamical resonances are quasi-bound quantum states that exist in the vicinity of a transition state for a bimolecular reaction.  These resonances are predicted to be ubiquitous among chemical reactions and can mediate reactivity at low temperatures. However, only a handful of resonances have been definitively observed or characterized.  Slow photoelectron velocity-map imaging of cryogenically cooled anions (cryo-SEVI) is a promising tool to examine dynamical resonances on neutral reactive surfaces.  The high resolution of cryo-SEVI spectroscopy resolves fine resonance features previously undetected by lower resolution methods. In this presentation recent cryo-SEVI experiments on the F + H2 and F + CH3OH hydrogen-abstraction reactions will be discussed along with complementary multi-dimensional quantum dynamical simulations performed on high level ab initio potential energy surfaces.

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