Reaction dynamics studies for the system Be-7+Pb-208 at Coulomb barrier energies

The scattering process of the Radioactive Ion Beam 'Be from a 208Pb target was measured at three near-barrier energies. The quasi-elastic angular distributions were analyzed within the framework of the optical model to extract the reaction cross sections. The results are compared with those obtained for the reactions induced by the mirror projectile 'Li and by the lightest particle-stable lithium isotope 6Li on the same target. The angular distributions for the production of the two 'Be constituent clusters, namely 3He and 4He, were also measured. In agreement with what observed for the interaction of 'Be with lighter targets, the production of the heavier helium isotope resulted to be much more abundant than that of its lighter counterpart.