ABSORPTION CROSS-SECTIONS FOR VIBRATIONALLY EXCITED FLUOROSULFATE RADICALS

The absorption cross-sections of vibrationally excited FSO3 radicals h ave been measured over the 340-470 nm wavelength range at 295 K. The r adicals are formed following the electronic quenching of the FSO3(B(2) E) radicals initially generated in the photolysis of F2S2O6 at 193 nm. Using previously obtained relaxation rate coefficients, a modelling o f the double-exponential decay of the vibrationally excited FSO3 with a consecutive first-order mechanism allows the determination of the ab sorption cross-sections for these species. Evidence is presented which suggests that these phenomenological cross-sections correspond to low -lying manifolds of vibrational states.