An ASAP treatment of vibrationally excited S2O: The v(3) mode and the v(3) + v(2) - v(2) hot band

作者：Thorwirth S^*; Martin Drumel M A; Endres C P; Salomon T; Zingsheim O; van Wijngaarden J; Pirali O; Gruet S; Lewen F; Schlemmer S; McCarthy M C

来源：Journal of Molecular Spectroscopy, 2016, 319: 47-49.

DOI：10.1016/j.jms.2015.12.009

• Fourier-transform spectroscopy
• Far-infrared
• Synchrotron radiation
• Millimeter-wave spectroscopy
• Disulfur monoxide
• S2O
• Radio-frequency discharge

The fundamental S-S stretching mode v(3) of disulfur monoxide, S2O, located at 679 cm(-1), has been investigated using Fourier-transform far-infrared spectroscopy at the SOLEIL synchrotron facility. A spectroscopic analysis has been performed using an Automated Spectral Assignment Procedure (ASAP) which permits accurate determination of more than 2000 energy levels from v3. In addition, the v(3) + v(2)-v(2) hot band was observed for the first time and some 500 corresponding energy levels were assigned. The high-resolution synchrotron study was complemented with pure rotational spectra of S2O in the (v(1), v(2), v(3)) = (0, 0,1) vibrational state observed in the frequency range from 250 to 280 GHz using a long-path absorption cell. From these combined measurements, extensive molecular parameter sets have been determined and precise band centers have been derived for both vibrational bands.

• 出版日期2016-1