OBSERVATION OF HIGH YLEXCITED STATES OF PROTONATED NITROGEN, $N_{2}H^{4}$
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Date
1989
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Ohio State University
Abstract
Each of the fundamental vibration bands of $N_{2}H^{+}$ has been previously $observed1-^{4}$ as well as the first hot $band^{4} v_{1}+v_{2}+v_{1}$. In this paper we report the observation of a very dense spectrum in the infrared region between $3240-3120 cm^{-1}$ corresponding to hot bands in each vibrational mode $(2v_{1}+v_{1}, v_{1}+v_{3}, v_{3}$ and $v_{1}+nv_{2}+nv_{2} (n=2,3)$. The spectrum was taken using our difference frequency spectrometer with the velocity modulation technique for detection. N2H was produced in a liquid-nitrogen cooled AC glow discharge with a mixture of 60 torr $N_{2}$. 120 mtorr $H_{2}$ and 7 torr He. The intensity of the lines had only a slight dependence on the amounts of N2 and H2+ whereas the hot bands decrease dramatically with the exclusion of He. Discussion of the vibrational and rotational temperatures will also be presented.
Description
$^{1}$ C. S. Gudeman, M. H. Begemann, J. Plaff and R. J. Saykally, J. Chem. Phys. 78, 5837 (1983). $^{2}$ T. J. Sears, J. Opt. Soc. Am. B. 2. 786 (1985). $^{3}$ S. C. Foster and A. R. W. McKellar, J. Chem. Phys, 81, 3424 (1984). $^{4}$ J. C. Owrutsky, C. S. Gudeman, C. C. Martiner, L. M. Tack, N. H. Rosenbaum and R. J. Saykally, J. Chem. Phys. 84, 605 (1986).
Author Institution: Department of Chemistry and Astronomy and Astrophysics, University of Chicago
Author Institution: Department of Chemistry and Astronomy and Astrophysics, University of Chicago