Abstract
The spectra of a 3 B 1 (ν 1 ν 2 ν 3 ) = (110) and (200)-X 1 A 1 (000) of 32 SO 2 and 34 SO 2 were obtained in a supersonic jet. Rotational structures were analyzed for both isotropic species to obtain precise rotational and spin constants. Rotational structure of b 3 A 2 was observed.