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Imaging resonances in low-energy NO-He inelastic collisions.

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Bibliographic Details
Title: Imaging resonances in low-energy NO-He inelastic collisions.
Authors: Vogels, Sjoerd N., Onvlee, Jolijn, Chefdeville, Simon, van der Avoird, Ad, Groenenboom, Gerrit C., van de Meerakker, Sebastiaan Y. T.
Source: Science (pre-March 2025). 11/13/2015, Vol. 350 Issue 6262, p787-790. 4p.
Subjects: Delocalization energy, Resonance frequency analysis, Inelastic collisions, Quantum scattering, Helium
Abstract: In molecular collisions, resonances occur at specific energies at which the colliding particles temporarily form quasibound 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 centimeter-1 energy range with 0.3 centimeter-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. [ABSTRACT FROM AUTHOR]
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Database: Psychology and Behavioral Sciences Collection
Description
Abstract:In molecular collisions, resonances occur at specific energies at which the colliding particles temporarily form quasibound 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 centimeter-1 energy range with 0.3 centimeter-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. [ABSTRACT FROM AUTHOR]
ISSN:00368075
DOI:10.1126/science.aad2356