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Imaging resonances in low-energy NO-He inelastic collisions

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arxiv 1510.00299 v1 pith:62VYQ4VN submitted 2015-10-01 physics.atm-clus

Sjoerd N. Vogels , Jolijn Onvlee , Simon Chefdeville , Ad van der Avoird , Gerrit C. Groenenboom , Sebastiaan Y.T. van de Meerakker This is my paper · ORCID
classification physics.atm-clus
keywords crossresonancesscatteringsectionscollisionsdifferentialenergyinelastic
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abstract

In molecular collisions, resonances occur at specific energies where the colliding particles temporarily form quasi-bound complexes, resulting in rapid variations in the energy dependence of scattering cross sections. Experimentally, it has proven challenging to observe such scattering resonances, especially in differential cross sections. We report the observation of resonance fingerprints in the state-to-state differential cross sections for inelastic NO-He collisions in the 13 to 19 cm$^{-1}$ energy range with 0.3 cm$^{-1}$ resolution. The observed structures were in excellent agreement with quantum scattering calculations. They were analyzed by separating the resonance contributions to the differential cross sections from the background through a partitioning of the multichannel scattering matrix. This revealed the partial wave composition of the resonances, and their evolution during the collision.

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