Spectroscopic observation of resonances in the F + H2 reaction

• Autores: Jongjin B. Kim, Marissa L. Weichman, Tobias F. Sjolander
• Localización: Science, ISSN 0036-8075, Vol. 349, Nº 6247, 2015, págs. 510-513
• Idioma: inglés
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• Resumen

  • Photodetachment spectroscopy of the FH2− and FD2− anions allows for the direct observation of reactive resonances in the benchmark reaction F + H2 → HF + H. Using cooled anion precursors and a high-resolution electron spectrometer, we observe several narrow peaks not seen in previous experiments. Theoretical calculations, based on a highly accurate F + H2 potential energy surface, convincingly assign these peaks to resonances associated with quasibound states in the HF + H and DF + D product arrangements and with a quasibound state in the transition state region of the F + H2 reaction. The calculations also reveal quasibound states in the reactant arrangement, which have yet to be resolved experimentally.