The photodissociation dynamics of cyclopentyl bromide at 234 and 266 nm were investigated using velocity ion imaging. Translational energy distributions of Br and Br* have been fitted by two Gaussian functions. It is possible that they are originated from different conformational structures. Three Gaussian functions are required to fit the distributions of Br* at 266 nm, which is attributed to the multiphoton dissociative ionization. The rigid radical limits of the impulsive model have been applied to the related energy partitioning. The branching ratios and the relative quantum yields were determined; the results indicated that ground-state bromine was the major dissociation product. (C) 2011 Elsevier B.V. All rights reserved.