The photodissociation dynamics of acetyl bromide was investigated at 234 nm. A two-dimensional photofragment ion-imaging technique coupled with a [2+1] resonance-enhanced multiphoton ionization scheme was utilized to obtain speed and angular distributions of the nascent Br(P-2(3/2)) and Br*(P-2(1/2)) atoms. The recoil anisotropies for the Br and Br* channels were measured to be beta=1.47+/-0.05 for Br and 1.44+/-0.05 for Br*. The relative quantum yield for Br* was found to be Phi(Br*)=0.37+/-0.05. The probability of nonadiabatic transition between two A' states was determined to be 0.36. Broad Gaussian distributions were observed for the total translational energy distributions corresponding to the Br and Br* channels. The soft radical limit of the impulsive model adequately modeled the related energy partitioning. It is proposed that the sigma*<--n transition localized on the C-Br chromophore mainly contributes to the initial transition of acetyl bromide at 234 nm.