NEW BAND SYSTEM OF MNSE MOLECULE

Thermal emission spectrum of MnSe molecule, excited in high temperatur e graphite furnace, has been.photographed in the spectral region lambd alambda4150-5800 angstrom at a reciprocal linear dispersion of 7.3 ang strom/mm. The study reveals the presence of two band systems viz. A-X and B-X in which B-X is entirely new. While the system A-X consists of 29 bands, the new system B-X comprises of 24 single headed and red de graded bands. Vibrational analysis performed suggested that both the s ystems involve ground state 6SIGMA with a vibrational frequency omega( e)'' = 361.0 cm-1. Transition responsible for MnSe spectrum appears to be of the type 6SIGMA-6SIGMA. An estimation of the ground state vibra tional frequency for MnTe molecule gives rise to its value as 280 cm-1 .