VIBRATIONAL OVERTONE TRANSITIONS OF OCS IN THE NEAR-INFRARED

Vibrational overtone transitions of OCS in the near infrared, 10 000-1 4 000 cm(-1), are observed for the first time by means of the photoaco ustic technique. The spectra are analyzed using molecular parameters a nd Hamiltonions derived far energy levels below 5000 cm(-1). It is dem onstrated that the molecular parameters of OCS for the low vibrational states can be extended to higher vibrational states within experiment al accuracy. A total of 14 transitions in three polyad groups were ass igned. Strong perturbations were observed in these highly excited stat es of OCS. (C) 1997 Academic Press.