HIGH RESOLUTION INFRARED SPECTRUM OF (HCl)2 - HCI STRETCH FUNDAMENTAL AND COMBINATION BAND ANALYSIS

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1990

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Ohio State University

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The infrared spectrum of jet cooled $(HCl)_{3}$ has been obtained with a high resolution difference frequency infrared spectrometer. Transitions originating from each of the tunneling sublevels with excitation of both the $\nu_{1}$ (free HCl) and $\nu_{2}$ (bound HCl) for all three isotopic species have been observed. In addition, combination band transitions involving high frequency HCl stretch plus low frequency van der Waals vibrations have been observed. These transitions probe higher levels of the geared tunneling coordinate and help elucidate the details of the intermolecular potential energy surface for $HCl(v-1) + HCl(v-O)$ collisions.

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Author Institution: Joint Institute for Laboratory Astrophysics, University of Colorado, and National Institute of Standards and Technology, and the Department of Chemistry and Biochemistry, University of Colorado

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