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Torsional Splitting in the 2ν9, and ν5 Vibrational Band of HNO3

✍ Scribed by T.M. Goyette; C.D. Paulse; L.C. Oesterling; F.C. Delucia; P. Helminger

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
313 KB
Volume
167
Category
Article
ISSN
0022-2852

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✦ Synopsis

Torsional splittings in both the (2 \nu_{9}) and (\nu_{5}) vibrational states have been resolved and observed in the millimeter/submillimeter spectrum of (\mathrm{HNO}{3}). The former splitting is due to the torsional motion of (\mathrm{H}) around the (\mathrm{NO}) bond in the (v{9}) mode, whereas the latter is due to the large mixing which results from the near degeneracy ( (17.34 \mathrm{~cm}^{-1}) ) of the two vibrational modes. It is possible to use these data in the context of a very simple model to quantitatively predict the observed intensity of the (2 \nu_{9}) infrared band. Furthermore, these data remove the fitting indeterminacy which exists in the rotation-vibration data between the difference in the vibrational energy of the two states and the Fermi interaction term. (1) 1994 Academic Press. Inc.

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