The B-A system of CP molecule

Abstract

The B-A system of CP molecule has been reinvestigated. The rotational structures in the (0, 0) and (1, 1) bands have been photographed in the second order of a 10.6 m grating with 25 μ slit width. The molecular constants have been determined using a weighted least squares fit computer program. It is found that the spin-splitting constant in the B-state is negative and not positive as reported by previous workers. An accurate value of α in the A-state could be determined. The present analysis also suggests that the spin-splitting constant in the ground state of CP should be positive, hence the assignment of the R 1 and R 2 or P 1 and P 2 branches in the B-X system of CP by Barwald et al should be interchanged. © 1981 Indian Academy of Sciences.