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dc.creatorWu, Shenghaien_US
dc.creatorDupré, Patricken_US
dc.creatorMiller, Terry A.en_US
dc.date.accessioned2008-01-11T21:58:13Z
dc.date.available2008-01-11T21:58:13Z
dc.date.issued2005en_US
dc.identifier2005-TJ-11en_US
dc.identifier.urihttp://hdl.handle.net/1811/30632
dc.descriptionAuthor Institution: Department of Chemistry, The Ohio State University, 120; W. 18th Avenue, Columbus OH, 43210en_US
dc.description.abstractRecently we have exploited the technique of cavity ring-down spectroscopy (CRDS) to observe electronic spectra in the near infrared (NIR) of reactive chemical intermediates, including a number of organic peroxy radicals. These spectra have all been recorded at near ambient temperature at total pressures of a few hundred torr. Correspondingly rotational (and finer) structure has been poorly resolved, e.g., CH$_3$O$_2$, or not at all. A great deal more could be learned about the structure of these reactive intermediates via high-resolution, rotationally resolved, jet-cooled NIR CRDS. To this end we have constructed a pulsed, slit-jet discharge for producing rotationally cold species. The narrow bandwidth source of the NIR radiation is described in the succeeding talk. We have tested this apparatus with vibrational transitions (polyad 2) of H$_2$O and the highly forbidden $a^1 \Delta_g - ^3\Sigma_g ^-$O$_2$ transition. Initial measurements indicate rotational temperatures of $\approx$15K. Using the known cross-sections, we estimate a spectrometer sensitivity for absorption of 10ppb/cm. We have used the discharge to create OH radicals and observed the v$=2\leftarrow 0$ vibrational overtone.en_US
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleHIGH RESOLUTION INFRARED CAVITY RINGDOWN SPECTROSCOPY WITH A PULSED, SLIT-JET DISCHARGE EXPANSIONen_US
dc.typearticleen_US


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