The 3ν 1 and ν 1 + 3ν 3 − ν 2 Absorption Bands of 16O 3

Abstract

Using a high-pressure × path length sample of ozone it has been possible to record at high resolution (0.006 cm −1) the 3-μm absorption region of this molecule. A thorough analysis of the spectra has been performed allowing one to assign for the first time the 3ν 1 band of 16O 3. Also, during the course of the analysis it became clear that, in this spectral region, another band almost as strong as 3ν 1 was absorbing: it is the ν 1 + 3ν 3 − ν 2 hot band. The (300) rotational levels were reproduced together with the (003), (102), and (201) ones [ J. Mol. Spectrosc. 141, 134-144 (1990)] using a Hamiltonian matrix which takes explicitly into account the Darling-Dennison and the Coriolis interaction terms affecting the levels. The band centers ν 0(3ν 3) = 3046.0878, ν 0(ν 1 + 2ν 3) = 3083.7030, ν 0(2ν 1 + ν 3) = 3186.4110, and ν 0(3ν 1) = 3289.9297 cm −1 were derived as well as precise rotational and coupling constants. Line intensities were also measured for 3ν 1 as well as for ν 1 + 3ν 3 − ν 2 and were reproduced with suitable transition moment operators. Finally a complete line list of the bands of 16O 3 absorbing around 3 μm has been generated.