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Torsional Splitting in the ν9Band of Nitric Acid

✍ Scribed by C.D. Paulse; L.H. Coudert; T.M. Goyette; R.L. Crownover; P. Helminger; F.C. De Lucia

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
523 KB
Volume
177
Category
Article
ISSN
0022-2852

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✦ Synopsis

A wide variety of microwave transitions within the £ 9 Å 1 vibrational state of nitric acid have been measured in the millimeter/submillimeter region. Torsional splittings on the order of 2.5 MHz have been observed and are due to the fact that the n 9 mode is a large amplitude torsional-type motion. Using an internal-axis-method-like formalism, an approach was developed to account for the effects of this large amplitude motion and was afterward applied to the analysis of the microwave frequencies. The model fits the data to within experimental accuracy, and provides quantitative predictions of relative transition intensities.

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