We study one-and two-neutron transfer reactions in ^(11)Be+^(208)Pb by using the quantum molecular dynamics model.We find that lowering about 1-2 MeV of the potential barrier of ^(208)Pb for fusion is gained when two neutrons separated from ^(11)Be enter into ^(208)Pb.Whereas no significant change of potential barrier is found when only the halo neutron separated from ^(11)Be enters into ^(208)Pb.The dynamical interplay between suppression and enhancement effects on the fusion probability in reaction ^(11)Be+^(208)Pb stemming from the easy separation of halo neutron and the long extending of neutron distribution is discussed.
展开▼
