dc.creator Hong, Hwei-Kwan en_US dc.creator Jacobsen, Clayton W. en_US dc.date.accessioned 2006-06-15T13:53:00Z dc.date.available 2006-06-15T13:53:00Z dc.date.issued 1977 en_US dc.identifier 1977-FA-6 en_US dc.identifier.uri http://hdl.handle.net/1811/9973 dc.description Author Institution: Radiation Laboratory University of Notre Dame en_US dc.description.abstract The resonant Raman effect of pyrazine was studied quantitatively with tunable UV lasers at liquid helium temperature. Solid solutions of pyrazine in benzene with various concentrations (3% to 0.1%) were used. Using the 990 $cm^{-1}$ benzene vibration as reference, the excitation profiles of Raman intensities for $\nu _{1}, \nu_{9}, \nu_{6a},$ and $\nu _{10a}$ were determined. It was found that both $\nu_{6a}$ and $\nu_{10a}$ are enhanced by a factor of $10^{6}$. The functional dependence is quite different for different vibrations, e.g., $\nu _{6a}$ shows a $(\Delta E)^{-2}$ dependence $(\Delta E$ is the difference between the excitation energy and the resonance), whereas, $\nu_{10a}$ shows a $(\Delta E)^{-4}$ dependence off resonance and a $(\Delta E)^{-1}$ dependence near resonance. Existing theories by Albrecht, Peticolas, etc., would predict $(\Delta E)^{-4}$ off resonance and $(\Delta E)^{-2}$ near resonance for $\nu_{10a}$ and $(\Delta E)^{-4}$ for $\nu_{6a}$ throughout. en_US dc.format.extent 133120 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title QUANTITATIVE STUDY OF EXCITATION PROFILES OF TOTALLY SYMMETRIC AND NONTOTALLY SYMMETRIC VIBRATIONS OP PYRAZINE WITH TUNABLE UV LASERS--A CRITICAL EXAMINATION OF VARIOUS THEORIES OF RAMAN INTENSITIES en_US dc.type article en_US
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