“…With the help of vibronic transition probability parameters such as Franck-Condon (FC) factors, -centroids, relative intensities, oscillator strength, and vibrational temperature of diatomic molecular species, the spectroscopic technique could be very useful in the identification of molecular lines and in the estimation of relative abundance of the species in astrophysical sources. A number of workers have therefore undertaken theoretical studies to provide those parameters for diatomic molecules which are of importance not only in astrophysics, but also in the fields of gas kinetics, combustion process, and so forth [9][10][11].…”