Fine structure analysis of 4846.0$AA$ and 4916.4$AA$ bands of PbCl molecule

Abstract

The electronic specturm of diatomic PbCl molecule has been eiccited in RF discharge source and (0,4 and (0,5) bands at 4846.0 $AA$ and 4916.4 $AA$, respectively, have been photographed at a resolution of 2 x $10^5$ in PGS-2 (Carl-Zeiss) using kodak 103-0 plates and a fine slit of 30 $mu m$. Rotational analysis of the bands has been performed and molecular constants including $alpha_e$ and $beta_e$ are reported. A detailed investigation leads to the proposition that the bands arise due to the electronic transition $A^2sumlimitsrightarrow X^2Pi_{1/2}$, both the states being in Hund's case (c).