Fusion cross sections measurement for 6Li + 159Tb

In order to investigate the effect of projectile breakup threshold energy on fusion in mass region around A∼170, we have carried out a systematic investigation of the fusion (both CF and ICF) cross sections for the systems 11B, 10B + 159Tb and 7Li + 159Tb at energies near and close to the barrier where 11B was considered to be a strongly bound nucleus. The nucleus 10B has a α-separation energy of 4.5 MeV. The measurements show that the extent of suppression of CF cross sections is correlated with the α-separation energies of the projectiles. As a further continuation of this work, we have recently carried out fusion excitation function measurement for the system 6Li + 159Tb (Coulomb barrier 27 MeV) at energies near and close to the barrier