Argon-ion laser excitation of the fluorosulfate radical

Discrete visible fluorescence has been observed from excitation of the fluorosulfate radical with argon-ion laser excitation which falls within its visible electronic absorption spectrum. Ground-state fundamentals of the radical have been determined which are in agreement with those determined from the analysis of the hot bands in the electronic absorption spectrum. The analysis of the fluorescence spectrum is consistent with the molecule possessing C_3r symmetry in the ground electronic state.