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LASER INDUCED FLUORESCENCE SPECTROSCOPY OF THE KETENYL RADICAL

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19251

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Title: LASER INDUCED FLUORESCENCE SPECTROSCOPY OF THE KETENYL RADICAL
Creators: Brock, L. R.; Rohlfing, Eric A.; Mischler, B.
Issue Date: 1999
Abstract: The ketenyl radical, HCCO, is widely recognized as a critical reaction intermediate in hydrocarbon combustion. In order to enable laser-based diagnostics of ketenyl in combustion and kinetics environments, we have examined the electronic spectroscopy of the $B ^{2}II - X^{2} A$'' band system of H(D)CCO using laser-induced florescence in a free-jet environment. We obtain both vibronically resolved excitation spectra and fully rotationally resolved spectra for the origin band and for four bands terminating on levels of $\Sigma$ vibronic symmetry, which are assigned to the two pairs of $\Sigma$ states derived from one quantum of excitation in each of the Renner-Teller active modes, the CCO and CCH(D) bend. In addition to the Renner-Teller and spin-orbit couplings, there is substantial evidence for additional perturbations among the low-lying bending levels in the first excited state of ketenyl.
URI: http://hdl.handle.net/1811/19251
Other Identifiers: 1999-MF-13
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