Elastic and break-up of the 1n-halo 11Be nucleus

The elastic and break-up angular distributions of the 10,11 Be+ 64 Zn reactions measured at E c.m. ≈1.4 V C have been analysed within the CCDC and O.M. frameworks. The suppression of the Coulomb-nuclear interference, observed in the 11 Be scattering case with respect to the 10 Be, has been interpreted as due to a long range absorption owing to the coupling with the break-up (Coulomb and nuclear) channels. The presence of 10 Be events on the 11 Be experiment data have been explained as due mainly to break-up processes.