dc.creator Parmenter, C. S. en_US dc.creator Setzer, B. en_US dc.creator Tang, K. en_US dc.date.accessioned 2006-06-15T13:46:53Z dc.date.available 2006-06-15T13:46:53Z dc.date.issued 1976 en_US dc.identifier 1976-RE-6 en_US dc.identifier.uri http://hdl.handle.net/1811/9712 dc.description Author Institution: Department of Chemistry, Indiana University en_US dc.description.abstract The switching of electronic energy between (almost) like molecules in collision has been studied under conditions where the transfer (or non-transfer) of vibrational quanta can also be followed. A low pressure of $C_{6}D_{6}$, can be pumped to its $S_{1}(0^{0})$ level in the presence of a low pressure of $C_{6}H_{6}$ without light absorption by the latter. If this is done, fluorescence is observed from the $S_{1}$ states of both species as a result of collisional E-E transfer. The transfer is efficient; the cross section is about half of that for a hard sphere collision. The fluorescence spectra are sufficiently open so that the relative populations of specific vibrational levels in the newly excited $C_{6}H_{6}$ molecules can be followed. Excitation in two levels of $C_{6}H_{6}$ can be seen clearly as a result of the energy transfers $$\begin{array}{l@{\qquad}l} C_{6}D_{6}^{*}(0^{0}) + C_{6}H_{6} \rightarrow C_{6}D_{6} + C_{6}H_{6}\ast(0^{0}) &\Delta E = -203 { cm}^{-1}\\ C_{6}D_{6}^{*}(0^{0}) + C_{6}H_{6} \rightarrow C_{6}D_{6} + C_{6}H_{6}\ast(16^{1}) &\Delta E = 34 { cm}^{-1} \end{array}$$ The cross section for the first channel exceeds that for the other by more than a factor of five, even though not favored by energy. en_US dc.format.extent 127176 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ELECTRONIC ENERGY TRANSFER BETWEEN LIKE POLYATOMIC MOLECULES IN THE VAPOR en_US dc.type article en_US
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