THE $3\nu_{2}$ OVERTONE BAND OF $H_{3}^{+}$

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 dc.creator Ventrudo, Brian F. en_US dc.creator Guo, Zhaoyu en_US dc.creator Cassidy, Daniel T. en_US dc.creator Joo, Sangwoo en_US dc.creator Oka, T. en_US dc.date.accessioned 2006-06-15T18:49:54Z dc.date.available 2006-06-15T18:49:54Z dc.date.issued 1993 en_US dc.identifier 1993-MG-2 en_US dc.identifier.uri http://hdl.handle.net/1811/18475 dc.description $^{1}$. B.M. Dinelli, S. Miller, and J. Tennyson, J. Mol. Spectrose. 153, 718-725(1992) $^{2}$. B.M. Dinelli, private communication. en_US dc.description Author Institution: Department of Engineering Physics, McMaster University; Department of Chemistry and Department of Astronomy and Astrophysics., The University of Chicago en_US dc.description.abstract Because of the small mass of hydrogen and the relatively shallow vibrational potential, the transition probabilities of overtone bands of $H_{3}^{+}$ do not decrease as drastically as those of other molecules. According to the first principle calculation by Dinelli, Miller, and $Tennyson^{1}$, the spontaneous emission probability of the second overtone band $3\nu_{2} (\ell = 1) \rightarrow 0$ is smaller than that of the fundamental band by a factor of less than 10. This corresponds to the reduction of absorption coefficient of about 180 and the spectrum is observable at the $H_{3}^{+}$ ion concentration of $3 \times 10^{10} cm^{-3}$. We have observed 15 vibration rotation transitions from 7265.9 to $6806 cm^{-1}$. InGaAsP diode lasers were used in a short-external cavity configuration to achieve laser operation in a single longitudinal mode. The observed frequencies agree with earlier prediction by Miller and Tennyson within $3 cm^{-1}$ but agree better with their new $prediction^{2}$. en_US dc.format.extent 78441 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title THE $3\nu_{2}$ OVERTONE BAND OF $H_{3}^{+}$ en_US dc.type article en_US