Complete rotational assignment of the (0,0) vibrational band of the A1?-X1S+ transition of carbon monosulfide

Carbon monosulfide (CS) generated in the S(D-1) + CS2 -> CS(X-1 sigma(+)) + S2 reaction was detected with the laser-induced fluorescence via the A(1)Pi-X-1 sigma(+) transition. The rotational structure of the (0,0) vibrational band is considerably deformed by the perturbation between the vibrational levels v = 0 of A(1)Pi and v = 10 of a('3)sigma(+) states. Both the appearance wavelengths and peak intensities of many rotational lines are varied by the size of the perturbation. The precise assignment of the rotational lines of the spin-forbidden transition a('3)sigma(+)-X-1 sigma(+) (10,0) bands has been given. The observed spectrum was well-reproduced with higher accuracy than any previous analysis.

Automated summary

In this study, carbon monosulfide generated in a specific reaction was detected using laser-induced fluorescence, and its rotational structure was analyzed. The results show that the characteristics of rotational lines are influenced by the perturbation between vibrational levels.