H. Majedifar - Department of Chemistry, Tarbiat Moallem University, Tehran, Iran
F. Hekmat - Department of Chemistry, Tarbiat Moallem University, Tehran, Iran

Franck-Condon factors are important parameters in absorption and emission electronic transitions, since they enter into the calculation of the relative band intensities, which are significant sources of information in quantitative spectroscopy, high-temperature chemistry, and astrochemistry. In this paper The values of the Franck-Condon factors for (A^2∏-X^2∑) system of the CN, and (B^1∏-X^1∑) system of the Li2 molecules have been reported using Rosen-Morse and Hua potential functions.