Coulomb versus nuclear break-up of 11Be halo nucleus in a non perturbative framework

.N The 11 Be break-up is calculated at 41 M eV per nucleon incident energy on di(cid:11)erent targets using a non perturbative tim e-dependent quantum calculation. The evolution of the neutron halo wave function shows an em ission of neutron at large angles for grazing im pact param eters and at forward angles for large im pact param eters. The neutron angular distribution isdeduced forthe di(cid:11)erenttargets and com pared to experim entaldata. W e em phasize the diversity ofdi(cid:11)raction m echanism s,in particular we dis-cuss the interplay of the nuclear e(cid:11)ects such as the towing m ode and the Coulom b break-up. A good agreem ent is found with experim ental data.