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First high-resolution analysis of the nu1, nu3, and nu1+nu3 bands of sulfur dioxide 33S16O2



Walter J. Lafferty, Jean-Marie Flaud, T. A. Blake


Fourier transform spectra of sulfur dioxide 33S16O2 have been recorded in the 8.0 µm and 4.0 µm spectral regions at a resolution of 0.0015 cm-1 using a Bruker IFS 125HR spectrometer leading to the observation of the ν1, ν3 and ν1 + ν3 vibrational bands of the 33S16O2 molecule. The corresponding upper state ro-vibrational levels were fit using a Hamiltonian matrix taking into account a Coriolis ΔKa =3 resonance between the ro-vibrational levels of the 11 and 31 vibrational states and a Watson-type Hamiltonian for the ro-vibrational levels of the 11 31 vibrational state. In this way it was possible to reproduce the upper state ro-vibrational levels to within the experimental uncertainty i.e. ~0.20 x 10-3 cm-1. Very accurate rotational and centrifugal distortion constants were derived from the fit together with the following band centers: ν0 (ν1) = 1147.979535(60) cm-1, ν0 (ν3) = 1353.335912(60) cm-1 and ν0 (ν1 +ν3) = 2487.493732(30) cm-1.
Journal of Molecular Spectroscopy


Rare isotopic species: Sulphur dioxide, high resolution infra spectrum


Lafferty, W. , Flaud, J. and , T. (2017), First high-resolution analysis of the nu1, nu3, and nu1+nu3 bands of sulfur dioxide 33S16O2, Journal of Molecular Spectroscopy, [online], (Accessed February 22, 2024)
Created January 20, 2017, Updated November 10, 2018