On the high resolution spectroscopy and intramolecular potential function of SO2

O.N. Ulenikov (1) , E.S. Bekhtereva (1) , S. Alanko (2) , V.-M. Horneman (2) , O.V. Gromova (3) , Claude Leroy (4)

1 Lab Mol Spect, Dept Phys
2 Department of Physical Sciences
3 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne
4 LPUB - Laboratoire de Physique de l'Université de Bourgogne

Two weak stretching bands, nu(1) + 3 nu(3) and 3 nu(1) + nu(3), of the sulfur dioxide molecule have been recorded at high resolution and analyzed for the first time with using a Fourier transform Bruker IFS-120 HR interferometer.About 1000 transitions with J(max.) = 51, K-a(max.) = 16, and 900 transitions with J(max.) = 53. K-a(max.) = 16 have been assigned to the bands nu(1) + 3 nu(3) and 3 nu(1) + nu(3), respectively. Analysis of the recorded spectra was made using the model of isolated vibrational states. Parameters obtained from the fit reproduce the initial experimental ro-vibrational energies with the rms deviation of 0.0006 and 0.0012 cm(-1) for the bands, 3 nu(1) + nu(3) and nu(1) + 3 nu(3), respectively. The problem of determination of the intramolecular potential function of SO2 is discussed

Mots clés: Sulfur dioxide; High-resolution spectra; Spectroscopic parameters; Potential function

Domaines: Physique Quantique [quant-ph]

O.N. Ulenikov, E.S. Bekhtereva, S. Alanko, V.-M. Horneman, O.V. Gromova, et al.. On the high resolution spectroscopy and intramolecular potential function of SO2. Journal of Molecular Spectroscopy, 2009, 257 (2), pp.137-156. ⟨10.1016/j.jms.2009.07.005⟩. ⟨hal-00448916⟩