First Analysis of the 3ν9 − ν9, 3ν9 − ν5, and 3ν9 − 2ν9 Bands of HNO3: Torsional Splitting in the ν9 Vibrational Mode

✍ Scribed by A. Perrin; J.M. Flaud; C. Camypeyret; B.P. Winnewisser; S. Klee; A. Goldman; F.J. Murcray; R.D. Blatherwick; F.S. Bonomo; D.G. Muircray; C.P. Rinsland

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 895 KB
• Volume: 166
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1187

✦ Synopsis

Using Fourier transform spectra recorded at 25 and (12 \mu \mathrm{m}), it has been possible to perform the first analysis of the (3 \nu_{9}-2 \nu_{9}, 3 \nu_{9}-\nu_{5}) and (3 \nu_{9}-\nu_{9}) hot bands of (\mathrm{HNO}{3}) located at (392.4 \mathrm{~cm}^{-1}), (409.8 \mathrm{~cm}^{-1}), and (830.4 \mathrm{~cm}^{-1}), respectively. An accurate description of the torsional splitting in the (v{9}=3) vibrational state was achieved, leading to the determination of the two torsional band centers (E_{\mathrm{v}^{-}=3.1}=1288.845 \mathrm{~cm}^{-1}) and (E_{v_{\mathrm{g}}=3.2}=1288.9036 \mathrm{~cm}^{-1}) and to the first determination of the (v_{9}) torsional potential of (\mathrm{HNO}{3}). Finally, the (4 \nu{9}-3 \nu_{9}, \nu_{5}+\nu_{9}-2 v_{9}), and (\nu_{5}+\nu_{9}-\nu_{9}) hot bands were identified for the first time at (375.3-376.1 \mathrm{~cm}^{-1}, 447.2 \mathrm{~cm}^{-1}) and (885.424 \mathrm{~cm}^{-1}) respectively. (c) 1994 Academic Press, Inc.