Variation of electronic transition moment for the band system (B1 →X 1 Σ +) of PbO

Abstract

The Franck-Condon factors andr-centroids have been computed by the more reliable numerical integration procedure for the bands of the (B1 →X 1 Σ +) system of the PbO molecule, using the suitable potential. The electronic transition moment variation with internuclear distance has been re-evaluated and this is represented by $$R_e \left( r \right) = const.\left( {0.525r - 1} \right)$$ in the range of 2.022×10−10 m≤r≤2.144×10−10 m. It is interesting that this representation is found to be similar to the form ofR e(r) for the band systems (AO + →X 1 Σ +) and (D1 →X 1 Σ + of PbO. Also the relative band strengths are derived. The form ofR e(r) reported by Dube et al is found to be in error.