The photodissociation dynamics of CF3Br in the A-band has been investigated utilizing a two-dimensional photofragment ion-imaging technique coupled with a state-selective resonance-enhanced multiphoton ionization scheme. The total translational energy distributions for the Br(2P3/2) and Br*(2P1/2) channels are well characterized by Gaussian functions with average translational energies of 183 and 151 kJ/mol, respectively. The recoil anisotropies were measured to be β=0.66 for Br and 1.83 for Br*. It was found that Br* production is preferred, with a relative quantum yield of 0.80. The reduction in the recoil anisotropy for Br results from nonadiabatic coupling between the Q11 and Q03 states. The fraction of molecules that dissociate via a distorted pathway induced by symmetry reduction from C3v to Cs is estimated to be 0.11.

No abstract