Submillimeter microwave spectrum and spectroscopic constants of the OCS molecule: Less abundant isotopic species of the molecule☆

Abstract Microwave spectra of the molecules 16 O 13 C 34 S, 17 O 12 C 32 S, 16 O 12 C 36 S, 18 O 12 C 34 S, 16 O 13 C 33 S in their natural abundances were investigated within the range 280–510 GHz. Rotational and centrifugal distortion constants are determined for the molecules in each vibrational state observed. For the first three molecules some constants of the vibrational-rotational interaction are also obtained.