Transition-State Spectroscopy of Partial Wave Resonances in the F + HD Reaction

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Science  19 Mar 2010:
Vol. 327, Issue 5972, pp. 1501-1502
DOI: 10.1126/science.1185694

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Partial wave resonances, quasi-bound resonance states with well-defined rotation in the transition state region of a chemical reaction, play a governing role in reaction dynamics but have eluded direct experimental characterization. Here, we report the observation of individual partial wave resolved resonances in the F + HD → HF + D reaction by measuring the collision energy–dependent, angle- and state-resolved differential cross section with extremely high resolution, providing a spectroscopic probe to the transition state of F + HD → HF + D. The agreement of the data with the high-level theoretical calculations confirms the sensitivity of this probe to the subtle quantum mechanical factors guiding this benchmark reaction.

  • * These authors contributed equally to this work.

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