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 Title: THz and ft-ir study of 18-o isotopologues of sulfur dioxide: 32S16O18O and 32S18O2 Author(s): Margulès, L. Contributor(s): Manceron, Laurent; Kwabia Tchana, F.; Perrin, Agnes; Demaison, J.; Motiyenko, R. A. Subject(s): Spectroscopy in Atmospheric Chemistry Abstract: Sulfur dioxide is a molecule that have a great interest in different domains: for atmospheric and planetology chemistry, it is also ubiquitous and abundant in interstellar medium. If the $^{16}$O species were extensively studied, this is not the case of the $^{18}$O isotopologues. The aim of this study is first to complete the rotational spectra of the ground state with these new measurements up to 1.5 THz, previous measurements are up to 1050 GHz for the $^{32}$S$^{16}$O$^{18}$O species\footnote{Belov, S. P.{\em et al.}, 1998, {\em J. Mol. Spectrosc.}~{\bf191}, 17}, and 145 GHz concerning the $^{32}$S$^{18}$O$_2$ species\footnote{Lindermayer, J.{\em et al.}, 1985, {\em J. Mol. Spectrosc.}~{\bf110}, 357}. The second part is making a global fit of the rotational and vibrational transitions for the excited vibrational states. For the $v_2$ band, we will complete the recent I.R. analysis\footnote{Gueye, F.{\em et al.} {\em Mol. Phys.}~{\bf in press}}. About the triad ($v_1, 2v_2, v_3$): $^{32}$S$^{18}$O$_2$ species was studied\footnote{Ulenikov, O. N.{\em et al.}, 2015, {\em JQSRT}~{\bf166}, 13}, but not the $^{32}$S$^{16}$O$^{18}$O one.\\ The FT-IR spectra were recorded on the AILES Beamline at Synchrotron SOLEIL using the Synchrotron light source, coupled to the Bruker IFS125HR Fourier transform spectrometer\footnote{Brubach, J.{\em et al.}, 2010, {\em AIP Conf. Proc.}~{\bf1214}, 81}. The THz spectra were obtained from 150 to 1500 GHz using the Lille's solid state spectrometer\footnote{Zakharenko, O.{\em et al.}, 2015, {\em J. Mol. Spectrosc.}~{\bf317}, 41}. The analysis is in progress, the latest results will be presented.\\ \em{Support from the French Laboratoire d'Excellence CaPPA (Chemical and Physical Properties of the Atmosphere) through contract ANR-10-LABX-0005 of the Programme d'Investissements d'Avenir is acknowledged} Issue Date: 2016-06-22 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper/Presentation Type: Text Language: En URI: http://hdl.handle.net/2142/91193 Rights Information: Copyright 2016 by the authors Date Available in IDEALS: 2017-01-26
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