# FIRST ANALYSIS OF THE $3\nu_{g}- \nu_{g}, 3\nu_{g}- \nu_{5}$ AND $3\nu_{9} -2\nu_{5}$ BANDS OF $HNO_{3}$: TORSIONAL SPLITTING IN THE $\nu_{9}$ VIBRATIONAL MODE.

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 Title: FIRST ANALYSIS OF THE $3\nu_{g}- \nu_{g}, 3\nu_{g}- \nu_{5}$ AND $3\nu_{9} -2\nu_{5}$ BANDS OF $HNO_{3}$: TORSIONAL SPLITTING IN THE $\nu_{9}$ VIBRATIONAL MODE. Creators: Perrin, A.; Flaud, J.- M.; Camy-Peyret, C.; Winnewisser, B. P.; Klee, S.; Goldman, A.; Murcray, F. J.; Blatherwick, R. D.; Bonomo, Francis S.; Murcray, D. G.; Rinsland, C. P. Issue Date: 1994 Publisher: Ohio State University Abstract: Using Fourier transform spectra recorded at Giessen University and at Denver University in the 25$m\mu m$ and 12$\mu m$ spectral regions respectively, it has been possible to perform the first analysis of the $3 \nu_{5} \nu_{5}$ and $3 \nu_{9} - \nu_{9}$ hot bands of $HNO_{3}$ located at $392.4 cm^{-1}$, $409.8 cm^{-1}$ and $830.4 cm^{-1}$ respectively. An accurate description of the torsional splitting in the $\nu_{9}=3$ vibrational state was achieved, leading to the determination of the two torsional band centers $E_{\nu_{9}=3.1}-1288.8451 cm^{-1}$ and $E_{\nu_{9}-3,2}=1288.9036 cm^{-1}$ and to the first determination of the $\nu_{9}$ torsional potential of $HNO_{3}$. Description: Author Institution: Laboratoire de Physique Mol\'{e}culaire et Applications, CNRS, Universit\'e Pierre et Marie Curie; Physikalish-Chemisches Institut, Justus-Liebig-Universitat; Department of Physics, University of Denver; Atmospheric Sciences Division, NASA Langley Research Center URI: http://hdl.handle.net/1811/13199 Other Identifiers: 1994-RH-04