F2 +-X2+ Band System of Cobalt Carbide

The laser-induced fluorescence excitation spectrum of CoC was recorded in the spectral region from 13500 cm1 to 22000 cm1, in which the CoC molecules were produced by the reaction of sputtered cobalt atoms with methanol under supersonic jet cooled conditions. Much of the visible spectrum was assigned to transitions between the X2+ ground state and F2+ state. The 11 bands assigned as (v = 313, 0) transitions of the F2+-X2+ band system were observed and rotationally analyzed. Equilibrium constants for the F2+ state were Te = 13628 cm1, e = 669 cm1, ee = 4.3 cm1, Be = 0.546 cm1, and Re = 1.758 A. Some new bands were observed.