FINE-STRUCTURE OF THE B2SIGMA+ AND A4SIGMA+ STATES OF CN AS DETERMINED BY MOLECULAR ANTICROSSING SPECTROSCOPY

The anticrossing between the Β2Σ+, v= 11, N = 20 and the a 4Σ+, N = 20 states of CN has been investigated in detail. The width and shape of the anticrossing signal are shown to be dependent upon the fine structure constants of the two states. Computer fits to this line shape have determined the spin-rotation constants of the states, the spin-spin constant of the quartet, the zero field separation, and a firm upper limit to the strength of the perturbation between the states. © 1979 American Institute of Physics.