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dc.creatorRezaei, M.en_US
dc.creatorSheybani-Deloui, S.en_US
dc.creatorMoazzen-Ahmadi, N.en_US
dc.creatorMcKellar, A. R. W.en_US
dc.date.accessioned2013-07-16T21:30:57Z
dc.date.available2013-07-16T21:30:57Z
dc.date.issued2013en_US
dc.identifier2013-MK-07en_US
dc.identifier.urihttp://hdl.handle.net/1811/55124
dc.descriptionAuthor Institution: Department of Physics and Astronomy, University of Calgary, 2500 University Dr., N.W., Calgary, Alberta T2N 1N4, Canada; National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canadaen_US
dc.description.abstractSpectra of the weakly-bound N$_2$O-CO$_2$, N$_2$O-OCS, and N$_2$O-N$_2$ complexes in the region of the N$_2$O $\nu_1$ fundamental band ($\sim$2224~cm$^{-1}$) are observed in a pulsed supersonic slit jet expansion probed with a quantum cascade laser. One new band is observed for each complex: two combination bands involving the intermolecular in-plane bending for N$_2$O-CO$_2$ and N$_2$O-N$_2$ complexes, and the out-of-plane torsional vibration for N$_2$O-OCS. The resulting intermolecular frequencies are 34.17, \textbf{138}, 044302 (2013).} 17.11 and 22.33 cm$^{-1}$ for N$_2$O-CO$_2$, N$_2$O-OCS, and N$_2$O-N$_2$ complexes, respectively. The intermolecular vibrations provide clear spectroscopic data against which theory can be benchmarked. These results will be discussed, along with a brief introduction to our pulsed-jet supersonic apparatus which has been retrofitted by an infrared cw external-cavity quantum cascade laser (QCL) manufactured by Daylight Solutions. The QCL is used in the rapid-scan signal averaging mode. Although the repetition rate of the QCL is limited by its PZT scan rate, which is 100 Hz, we describe a simple technique to increase the effective repetition rate to 625 Hz. In addition, we have significantly reduced the long term frequency drift of the QCL by locking the laser frequency to the sides of a reference line.en_US
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleOBSERVATION OF COMBINATION BANDS INVOLVING INTERMOLECULAR VIBRATIONS OF N$_2$O-N$_2$, N$_2$O-OCS AND N$_2$O-CO$_2$ COMPLEXES USING AN EXTERNAL CAVITY QUANTUM CASCADE LASERen_US
dc.typeArticleen_US
dc.typeImageen_US
dc.typePresentationen_US


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