Halo effects on fusion cross section in He-4,He-6+Zn-64 collision around and below the coulomb barrier

The structure of the halo nuclei is expected to influence the fusion mechanism at energies around and below the Coulomb barrier. Here new data of He-4+Zn-64 at sub-barrier energies are presented which cover the same energy region of previous measurements of He-6+Zn-64. The fusion cross section was measured by using an activation technique where the radioactive evaporation residues produced in the reaction were identified by the X-ray emission which follows their electron capture decay. By comparing the two system, we observe an enhancement on the fusion cross section in the reaction induced by He-6, at energy below the Coulomb barrier. It is shown that this enhancement seems to be due to static properties of halo 2n He-6 nucleus.