Abstract
Role of cluster structures of Li-7 on reaction dynamics have been studied by performing exclusive measurements of prompt-gamma rays from residues with scattered particles at energy, E/Vb = 1.6, with Pt-198 target. Yields of the residues resulting after capture of t and He-4,He-5,He-6, corresponding to different excitation energies of the composite system were estimated. The results were compared with three body classical-dynamical model for breakup fusion, constrained by the measured fusion, alpha and t capture cross-sections. The cross-section of residues from capture of alpha and t agreed well with the prediction of the model showing dominance of the two step process - breakup fusion, while those from tightly bound He-6 showed massive transfer to be the dominant mechanism.