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Type: Journal article
Title: Photodissociation spectroscopy and dynamics of the CH₂CFO radical
Other Titles: Photodissociation spectroscopy and dynamics of the CH(2)CFO radical
Author: Hoops, A.
Gascooke, J.
Kautzman, K.
Faulhaber, A.
Neumark, D.
Citation: Journal of Chemical Physics, 2004; 120(18):8494-8504
Publisher: Amer Inst Physics
Issue Date: 2004
ISSN: 0021-9606
Statement of
Alexandra A. Hoops, Jason R. Gascooke, Kathryn E. Kautzman, Ann Elise Faulhaber, and Daniel M. Neumark
Abstract: <jats:p>The photodissociation spectroscopy and dynamics resulting from excitation of the B̃ 2A″←X̃ 2A″ transition of CH2CFO have been examined using fast beam photofragment translational spectroscopy. The photofragment yield spectrum reveals vibrationally resolved structure between 29 870 and 38 800 cm−1, extending ∼6000 cm−1 higher in energy than previously reported in a laser-induced fluorescence excitation spectrum. At all photon energies investigated, only the CH2F+CO and HCCO+HF fragment channels are observed. Both product channels yield photofragment translational energy distributions that are characteristic of a decay mechanism with a barrier to dissociation. Using the barrier impulsive model, it is shown that fragmentation to CH2F+CO products occurs on the ground state potential energy surface with the isomerization barrier between CH2CFO and CH2FCO governing the observed translational energy distributions.</jats:p>
Rights: © 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
DOI: 10.1063/1.1691016
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