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THE ELECTRONIC SPECTRUM AND MOLECULAR STRUCTURE OF THE JET-COOLED SILICON METHYLIDYNE (SiCH) RADICAL

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19399

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Title: THE ELECTRONIC SPECTRUM AND MOLECULAR STRUCTURE OF THE JET-COOLED SILICON METHYLIDYNE (SiCH) RADICAL
Creators: Smith, Tony C.; Li, Haiyang; Clouthier, Dennis J.; Kingston, C. T.; Merer, A. J.
Issue Date: 1999
Abstract: Small hydrogen-containing silicon-carbon compounds are important as potential precursors to the $SiC_{n}$ clusters found in stellar atmospheres. In this work, we have observed the $\widetilde{A} {^{2}}\Sigma^{+} - \widetilde{X} {^{2}}\Pi_{i}$ electronic transition of the jet-cooled silicon methylidyne radical, produced by fragmentation of tetramethylsilane in a pulsed discharge jet. Extensive systems of rotationally discrete bands of both SiCH and SiCD have been observed in the $855 - 605 nm$ region. Use of a ``reheat tube'' at the exit of the jet has allowed us to observe both spin-orbit components, which have a $70cm^{-1}$ separation. High resolution spectra have been obtained for both SiCH and SiCD, providing rotational constants and molecular structures for the ground and excited states.
URI: http://hdl.handle.net/1811/19399
Other Identifiers: 1999-RI-10
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