Interplay Between Fusion, Transfer and Break-Up Reactions at Near - Barrier Energies

The role of the breakup process of stable weakly bound light projectiles and the transfer channels on the near barrier fusion reaction and elastic scattering are investigated by different approaches. From a semi-classical formalism it is discussed the conditions that should be fulfilled by a transfer channel, in order to be important as a doorway to fusion. The measurement of the elastic scattering for the ^6,7Li + ¹³⁸Ba and ⁹Be + ⁶⁴Zn systems were used to study the behavior of the threshold anomaly and its consequences for the fusion process. The fusion cross sections for the ⁹Be + ⁶⁴Zn system were compared with the ones from other similar systems where no break-up is expected. There are signatures of fusion suppression only for the ⁶Li + ¹³⁸Ba system.