New High-Resolution Analysis of the 3ν3 and 2ν1 + ν3 Bands of Nitrogen Dioxide (NO2) by Fourier Transform Spectroscopy

✍ Scribed by T.M. Stephen; A. Goldman; A. Perrin; J.-M. Flaud; F. Keller; C.P. Rinsland

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 188 KB
• Volume: 201
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2000.8064

✦ Synopsis

Using new high-resolution Fourier transform spectra recorded at the University of Denver in the 2-m region, a new and more extended analysis of the 2 1 ϩ 3 and 3 3 bands of nitrogen dioxide, located at 4179.9374 and 4754.2039 cm Ϫ1 , respectively, has been performed. The spin-rotation energy levels were satisfactorily reproduced using a theoretical model that takes into account both the Coriolis interactions between the spin-rotation energy levels of the (201) vibrational "bright" state with those of the ( 220) "dark" state. The interactions between the (003) bright state with the (022) dark state were similarly treated. The spin-rotation resonances within each of the NO 2 vibrational states were also taken into account. The precise vibrational energies and the rotational, spin-rotational, and coupling constants were obtained for the two dyads {( 220), ( 201)} and {( 022), (003)} of the 14 N 16 O 2 interacting states. From the experimental line intensities of the 2 1 ϩ 3 and 3 3 bands, a determination of their vibrational transition moment constants was performed. A comprehensive list of line positions and line intensities of the {2 1 ϩ 2 2 , 2 1 ϩ 3 } and the {2 2 ϩ 2 3 , 3 3 } interacting bands of 14 N 16 O 2 was generated. In addition, assuming the harmonic approximation and using the Hamiltonian constants derived in this work and in previous studies (A.