COMBINATION BANDS BETWEEN 2900 AND 3600 CM$^{-1}$ OF CYCLIC O$_4$ CATION TRAPPED IN SOLID NEON

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2013

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Ohio State University

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The infrared spectrum of cyc-O$_4$$^+$ trapped in solid neon includes a group of combination bands built on {(\nu$_1$ + \nu$_5$)} of ground-state cyc-O$_4$$^+$. Each peak lies close to a counterpart previously reported in a study of the infrared laser photodissociation spectroscopy of a mass-selected molecular beam. This agreement is consistent with the vibrational assignment of three low-frequency modes of cyc-O$_4$$^+$ that was proposed in the earlier study. The spectra obtained for the isotopologues formed by the substitution of one or two $^{18}$O$_2$ moieties suggest the occurrence of interaction with a nearby excited electronic state.

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Author Institution: Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8441

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