FOURIER TRANSFORM EMISSION SPECTROSCOPY AT $13 \mu m$ : SiS
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Date
1990
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Publisher
Ohio State University
Abstract
The vibration-rotation spectrum of silicon monosulfide, an important astrophysical molecule, has been observed in emission between 640 and $800 cm^{-1}$ using the Fourier transform spectrometer associated with The McMath Solar Telescope at Kitt Peak. Gas phase SiS was produced by the reaction of solid silicon with silicon disulfide. $SiS_{2}$. in an alumina heat pipe oven. The mixture was heated to $1000^{\circ} C$ and the mission was focused on the entrance aperture of the Fourier transform spectrometer. More than two thousand four hundred lines were assigned to four isotopomers $(^{28}Si^{32}S, ^{28}S^{34}Si,^{29}Si^{32}S$ and $^{12}Si ^{32}S$). The data for all the isotopomers series were fitted together using the mass-reduced Dunham expression including Watson's Born-Oppenheimer breakdown coefficients.
Description
Author Institution: Department of Chemistry, University of Arizona