Fine structure analysis of 4702 $AA$ band of the molecule

Abstract

The emission spectrum of the cobalt monochloride molecule has been excited in a high frequency discharge tube source and the (0,0) band of H-system at 4702 $AA$ was photo-graphed at an inverse dispersion of 0.973 $AA$/mm in the 5th order of a two meter plane grating spectrograph (Carl-Zeiss). The fine structure analysis of the band has been carried out and the molecular constants are reported for the first time. Rotational isotopic shift due to $^{37}Cl$ support the analysis. The electronic transition involved is of the type $0^{-}-0^{-}$ of case (c) which is equivalent of $^3sum^+ - ^3sum^+$ or $^5sum^+ - ^5sum^+$.