High resolution Fourier transform spectrum of 69GaCl

The electronic emission spectrum of the A3Π0-X1Σ+ and B3Π1-X1Σ+ transitions of Gallium monochloride molecule (69GaCl) has been recorded on BOMEM DA8 Fourier transform spectrometer at an apodized resolution of 0.035 cm−1. The rotational structure of the 0-0, 1-0, 2-1, and 3-2, bands belonging to A-X and 0-0, 0-1, 1-2, and 0-2 bands belonging to B-X transitions has been analyzed and equilibrium rotational constants for the X1Σ+ and A3Π0 states have been obtained. For the first time we are able to determine the Λ-doubling constants in the v = 0 and 1 levels of the B3Π1 state.