Franck-Condon factors and r-centroids for the E1Σ+−X1Σ+ bands of SiS and SiSe

Abstract By using the computer program TRAPRB developed by Jarmain and McCallum, Franck-Condon factors and r-centroids have been calculated for the E 1 Σ + − X 1 Σ + bands of the SiS and SiSe radicals. Intensities of these bands have been visually estimated from the emission spectra photographed on a 3.4 m Ebert grating spectrograph (5 A/mm). A comparison of the Franck-Condon factors with these estimated intensities shows reasonable agreement.