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dc.creatorZhao, X.en_US
dc.creatorAdamson, G. W.en_US
dc.creatorField, R. W.en_US
dc.date.accessioned2006-06-15T18:38:22Z
dc.date.available2006-06-15T18:38:22Z
dc.date.issued1990en_US
dc.identifier1990-MG-3en_US
dc.identifier.urihttp://hdl.handle.net/1811/18119
dc.description$^{1}$ R. Vasudev and R. N. Zare, J. Chem. Phys. 53, 5267 (1982).en_US
dc.descriptionAuthor Institution: Department of Chemistry and George R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technologyen_US
dc.description.abstractSeveral vibrational bands belonging to the $\bar{B}-\bar{X}$ electronic system) of formyl radical (HCO) have been observed in fluorescence excitation in the $38,750-38,340 cm^{-1}$ region. The formyl radical was formed by photodissociation of acetaldehyde at 308nm. Surprisingly, the lifetime for the lowest few $\bar{B}$-state vibrational levels is 10-50ns. In contrast, the lifetimes of the first few $\bar{A}$-state vibrational levels are approximately $30ps.^{1}$ We have recorded high resolution spectra (FWHM $0.1 cm^{-1}$) of the origin band and assigned the rotational transitions as belonging to a type-A and type-B hybrid band. The proof that these sub-bands are from HCO comes from ground state combination differences and term value plots. Analysis of the high resolution spectra has also allowed us to determine the upper state rotational constants $(A'=15.8 \pm 0.5 cm-1, B'=1.193 \pm 0.02 cm^{-1}, C= 1.106 \pm 002 cm^{-1})$ and band origin $(38,695.48 cm^{-1})$ for the $\bar{B} - \bar{X} O^{0}_{0}$ band. We are currently recording SEP spectra which will verify our rotational assignments, as well as fluorescence excitation spectra of DCO, to more accurately determine the geometry of the B-state.en_US
dc.format.extent83500 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleOBSERVATION OF $\tilde{B}$-$\tilde{X}$ FLUORESCENCE EXCITATION SPECTRUM OF FORMYL RADICALen_US
dc.typearticleen_US


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