First analysis of the rotationally-resolved nu(2) and 2 nu(2)-nu(2) bands of sulfur dioxide, (SO2)-S-33-O-16

摘要

A Fourier transform spectrum of sulfur dioxide (SO2)-S-33-O-16 has been recorded in the 18.3 mu m spectral region at a resolution of 0.002 cm(-1) using a Bruker IFS 125HR spectrometer leading to the observation of the v(2) and 2v(2)-v(2) vibrational bands of the (SO2)-S-33-O-16 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 rovibrational levels to within the experimental uncertainty; i.e., similar to 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: v(0) (v(2)) = 515.659089(50) cm(-1,) v(0)(2v(2)) = 1030.697723(20) cm(-1). (C) 2017 Elsevier Inc. All rights reserved.