Slice imaging of methyl bromide photofragmentation at 193 nm

Abstract

The photodissociation of methyl bromide at 193 nm is studied using slice imaging. From the measured photofragment translational energy and angular distributions we were able to extract methyl-state-specific dissociation channel yields and crossing probabilities between ³Q₀ and ¹Q₁ surfaces. The angular distributions for the Bromine photofragments show a strong dependence on the total translational energy release. Nonadiabatic transition probabilities from the ³Q₀ to ¹Q₁ surface dominate the dynamics in this excitation energy region and for most of the methyl vibrational states probed.