Evidence of massive cluster transfers in 19F+232Th reaction at near barrier energies

Yields and angular distributions of the transfer reaction products have been measured in the 19F+232Th reaction at bombarding energies near the Coulomb barrier. The transfer probabilities were calculated (Ptr) from the measured differential cross sections at the grazing angle, for the most dominant channels for given (ΔN) transfers. The values of Ptr show, in general, an exponential dependence on the ground state Q value (Q0) of the reaction and the large cross sections observed for 1α and 2α transfer channels are largely accounted by the Q-value variations. However, the transfer channels of ΔN=5, 9, and 12 leading to 14C, 10Be, and 7Li products, respectively, show strong enhancements in the transfer probabilities. The large cross sections in these channels may imply simultaneous correlated transfers of (αp), (αp,α), and (3α) clusters from the 19F projectile to the target