New Analysis of 2ν₁ + ν₂, ν₁ + ν₂ + ν₃, and ν₂ + 2ν₃ Bands of Ozone in the 2600–2900 cm^-1 Region

Author： Mikhailenko S. Barbe A. Plateaux J.J. Tyuterev V.G.

ISSN： 0022-2852

Source： Journal of Molecular Spectroscopy, Vol.196, Iss.1, 1999-07, pp. : 93-101

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Abstract

The 2600–2900 cm^-1 spectral range is revisited for an accurate determination of line intensities of the 2ν₁ + ν₂, ν₁ + ν₂ + ν₃, and ν₂ + 2ν₃ bands of ozone. The fit on 1702 energy levels of (012), (111), and (210) states determined from observed transitions with J_max ≤ 61 and K_{a max} ≤ 17 gives a rms = 5.6 × 10^-4 cm^-1 and provides a satisfactory agreement between calculated and observed line positions. Line intensities have been measured and fitted, leading to the determination of transition moment parameters for the three bands. Using these parameters, we have obtained the following estimations for the integrated band intensities S(ν₁ + ν₂ + ν₃) = 2.509 × 10^-20, S(ν₂ + 2ν₃) = 0.330 × 10^-20, and S(2ν₁ + ν₂) = 0.0802 × 10^-20 cm^-1/mol cm^-2 at 296 K, with a cutoff of 10^-26 cm^-1/mol cm^-2. The value of the μ^{(210)–(000)}₁ parameter associated with the φ_x operator for 2ν₁ + ν₂ band obtained in our analysis appears to be eight times smaller than the previously determined value of this parameter [M. A. H. Smith, C. P. Rinsland, J. M. Flaud, C. Camy-Peyret, and A. Barbe, J. Mol. Spectrosc. 139, 171–181 (1990)]. The general line listing of the 2ν₁ + ν₂, ν₁ + ν₂ + ν₃, and ν₂ + 2ν₃ bands (up to J_max = 70 and K_{a max} = 23) has been generated with an intensity cutoff 10^-26 cm^-1/mol cm^-2. The perturbations of (111) and (012) states by the (040) state are discussed.