Observation of Feshbach Resonances in the F + H 2 → HF + H Reaction
- 10 March 2006
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 311 (5766), 1440-1443
- https://doi.org/10.1126/science.1123452
Abstract
Reaction resonances, or transiently stabilized transition-state structures, have proven highly challenging to capture experimentally. Here, we used the highly sensitive H atom Rydberg tagging time-of-flight method to conduct a crossed molecular beam scattering study of the F + H 2 → HF + H reaction with full quantum-state resolution. Pronounced forward-scattered HF products in the v ′ = 2 vibrational state were clearly observed at a collision energy of 0.52 kcal/mol; this was attributed to both the ground and the first excited Feshbach resonances trapped in the peculiar HF( v ′ = 3)-H′ vibrationally adiabatic potential, with substantial enhancement by constructive interference between the two resonances.Keywords
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