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 Title: HIGH-RESOLUTION INFRARED SPECTRA AND ANALYSES OF SiF4 Author(s): Boudon, Vincent Contributor(s): Manceron, Laurent Subject(s): Atmospheric science Abstract: \begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.2]{Fig_nu3.eps} \end{wrapfigure} Volcanoes reject large amounts of sulfur-containing gases in the atmosphere; these represent 10 to 15~\% of the anthropogenic sulfur emissions. Thermodynamic considerations show that silicon tetrafluoride (SiF$_4$) should be a normal trace component of volcanic gases. Some studies report that the possible importance of SiF$_4$ had been neglected because of the problems of reporting HF and SiF$_4$ separately in conventional analyses. However, a better knowledge of spectroscopic parameters is needed for this molecule in order to derive accurate concentrations. This is why we undertook an extensive high-resolution study of its infrared absorption bands, including the fundamentals and several overtone and combinations. We present here a detailed analysis and modeling of the strongly absorbing $\nu_3$ fundamental, for the there isotopplogues in natural abundance: ${}^{28}$SiF$_4$ (92.23~\%), ${}^{29}$SiF$_4$ (4.67~\%) and ${}^{30}$SiF$_4$ (3.10~\%). Progresses in the analysis of the other bands will be outlined. Issue Date: 2019-06-21 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/104572 DOI: 10.15278/isms.2019.FB08 Rights Information: Copyright 2019 Vincent Boudon Date Available in IDEALS: 2019-07-152020-01-25
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