The ν2 and 2ν2 - ν2 bands of 14N 16O2: Electron Spin-Rotation and Hyperfine Contact Resonances in the (010) Vibrational State

✍ Scribed by A. Perrin; J.M. Flaud; C. Camypeyret; A. Goldman; F.J. Murcray; R.D. Blatherwick; C.P. Rinsland

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 375 KB
• Volume: 160
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1192

✦ Synopsis

High-resolution Fourier transform spectra covering the (720-920 \mathrm{~cm}^{-1}) spectral region have been used to perform a reanalysis of the (\nu_{2}) band (((010)-(000)) vibrational transition ()) together with the first analysis of the (2 \nu_{2}-\nu_{2}) hot band of nitrogen dioxide (((020)-(010)) vibrational transition). The high-quality spectra show that, for numerous (\nu_{2}) lines, the hyperfine structure is easily observable in the case of resonances due to the hyperfine Fermi-type operator. By performing a full treatment of the spin-rotation and of the hyperfine operators, a new line list of the (\nu_{2}) band (positions and intensities) has been generated, and it is in excellent agreement with the experimental spectrum. Also, a thorough analysis of the (2 \nu_{2}-\nu_{2}) hot band has been performed leading to an extended set of new (020) spin-rotation levels. These levels, together with the ({(100),(020)), (001) } spin-rotation levels deduced previously from the analysis of the (v_{1}, 2 \nu_{2}), and (v_{3}) cold bands performed in the 6.3- to (7.5-\mu \mathrm{m}) spectral range [A. Perrin, J.-M. Flaud, C. Camy-Peyret, A.-M. Vasserot, G. Guelachvili, A. Goldman, F. J. Murcray, and R. D. Blatherwick, J. Mol. Spectrose 154, 391-406 (1992)] were least-squares fitted, allowing one to derive a new set of vibrational band centers and rotational, spin-rotation, and interaction constants for the ({(100)(020)(001)}) interacting states of ({ }^{14} \mathrm{~N}^{16} \mathrm{O}_{2}). C 1993 Academic Press. Inc.