Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

First analysis of the rotationally-resolved ν2 and 2ν2- ν2 bands of sulfur dioxide, 33S16O2



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


A Fourier transform spectrum of sulfur dioxide 33S16O2 has been recorded in the 18.3 µm spectral region at a resolution of 0.002 cm-1 using a Bruker IFS 125HR spectrometer leading to the observation of the ν2 and 2ν2- ν2 vibrational bands of the 33S16O2 molecule. The corresponding upper state ro-vibrational levels were fit using Watson-type Hamiltonians. 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 (ν2) =515.659089(50) cm-1, ν0 (2ν2) = 1030.697723(20) cm-1.
Journal of Molecular Spectroscopy


band centers, greenhouse gas, infrared spectrum, rotational analysis, sulfur dioxide, Watson Hamiltonian


Blake, T. , Flaud, J. and Lafferty, W. (2017), First analysis of the rotationally-resolved ν2 and 2ν2- ν2 bands of sulfur dioxide, 33S16O2, Journal of Molecular Spectroscopy, [online], (Accessed July 14, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created January 2, 2017, Updated October 12, 2021