R−K−R−V potential energy curve, Franck— Condon factors andr-centroids forE 1 Σ +-X 1 Σ + system of SiS molecule

Abstract

The potential energy curve for theE 1 Σ + state of SiS molecule has been evaluated by the R−K−R−V method. The Franck—Condon factors are computed byFraser andJarmain’s method withr e -shift corrections.r-centroids have been determined by both quadratic equation method and graphical method as suggested byNicholls andJarmain. The intensity distribution in the band system under consideration is explained on the basis of F−C factors. Calculation ofr-centroids shows that the sequence difference i.e. $$\Delta r = \bar r_{v'v''} - \bar r_{v' + 1,v'' + 1} $$ remains constant.