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Abstract
High-resolution emission spectra were obtained from a hollow cathode discharge in SiCl4/Ar mixtures. In the 360–450 nm region the emission of the transition of
was detected and also the A2Σ+–X2Π transition of SiCl, previously analysed by Bredohl and co-workers. Some new bands of the A–X system of SiCl were identified and their rotational structure analysed. Improved molecular constants for the A2Σ+ state of SiCl have been obtained from the new data and those of Bredohl
et al
. For the emission of the
transition of
no vibrational or rotational structure could be resolved with a resolution of 10−3 nm.
Acknowledgements
I am indebted to Professor M. C. van Hemert for stimulating discussions.