EMISSION SPECTRUM OF $S_{2}$ IN THE VACUUM ULTRAVIOLET REGION
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Date
1959
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Ohio State University
Abstract
By using a transformer discharge in sulphur vapor, we observed a group of emission bands in the region, 1700--2000 A. The individual bands are single headed and are degraded toward to violet, while their intensities are much weaker than those of the $B^{3}\Sigma_{u}^{-}\rightarrow X^{3}\Sigma^{-}_{g}$. According to our analysis, there are two systems of bands; the upper states of both systems are close to each other and they have a common lower state which is most probably the ground state. $X^{3}\Sigma^{-}_{g}$ of $S_{2}$. The excitation energies of their upper states are also very close to that of $C(^{3}\Pi_{u})$, but they belong neither to the transition $C(^{3}\Pi_{u})\rightarrow X^{3}\Sigma^{-}_{g}$, nor to $D^{3}\pi_{u}\rightarrow X^{3}\Sigma^{-}_{x}$ both of which have been observed in $absorption.^{1}$
Description
$^{1}$ K. Wieland, M. Wehrli, and E. Miescher, Helv. Phys. Acta, 7, 841 (1934),R. Maeder, Helv, Phys. Acta, 21, 411 (1948).
Author Institution: Geophysics Research Directorate, Air Force Cambridge Research Centre
Author Institution: Geophysics Research Directorate, Air Force Cambridge Research Centre