Evidence of strong effects of the 11Be halo structure on reaction processes at energies around the Coulomb barrier

Abstract

The collision induced by the three Beryllium isotopes, 9;10;11Be, on 64Zn target were investigated at Ec:m: 1.4 the Coulomb barrier. Elastic scattering angular distributions were measured for the 9;10Be collisions whereas, in the 11Be case the quasielastic scattering angular distribution was obtained. A strong damping of the quasielastic cross-section was observed in the 11Be case, especially in the angular range around the Coulomb-nuclear interference peak. In this latter case a large total-reaction cross-section is found, more than a factor of two larger than the ones extracted in the reactions induced by the non-halo Beryllium isotopes. A large contribution to the total-reaction cross-section in the 11Be case could be attributed to transfer and/or break-up events.