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dc.creatorKnight, Alan E. W.en_US
dc.creatorParmenter, C. S.en_US
dc.date.accessioned2006-06-15T13:43:05Z
dc.date.available2006-06-15T13:43:05Z
dc.date.issued1975en_US
dc.identifier1975-WG-04en_US
dc.identifier.urihttp://hdl.handle.net/1811/9544
dc.descriptionAuthor Institution: Department of Chemistry, Indiana Universityen_US
dc.description.abstract$Ar^{+}$ - laser excitation has been used to pump several vibrational bands in the $^{1}A_{u} \leftarrow ^{1}A_{g}$ electronic transition of glyoxal. The laser band-width restricts each excitation to $\approx 10-15$ rotational levels of the $^{1}A_{u}$ state. Fluorescence after excitation to the level ${v^{\prime}}^{7} = 1$ shows features due to yibrational relaxation to the $0^\circ$ state at pressures as low as $5 \times 10^{-4}$ Torr. At this pressure no appreciable rotational relaxation can be observed within the $7_{1}$ state but the rotational structure of the $0^\circ$ O emission band indicates that rotational quantum number changes have accompanied vibrational relaxation. Strong propensity rules for $\Delta K$ are observed. Fluorescence after pumping the aero point level directly shows little evidence of rotational equilibration even at pressures up to $10^{-2}$ Torr. The course of rotational energy transfer has been followed as a function of pressure. Collision-induced intersystem crossing is found to compete effectively with rotational and vibrational relaxation.en_US
dc.format.extent132961 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleROTATIONAL RELAXATION IN THE $^{1}A_{u}$ STATE OF GLYOXAL VAPORen_US
dc.typearticleen_US


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