ABSTRACT
Processes in which nucleons are transferred between target and projectile play a dominant role in heavy-ion collisions. Such transfer reactions take place when the surfaces of the two nuclei come to distances where the tail of the wavefunctions of the nucleons in one of the systems starts to overlap with the attractive nuclear field of the other system. In grazing collisions where the two nuclei only have a small overlap, transfer reactions are relatively weak, and one can make detailed spectroscopic studies of discrete states. In closer collisions where the transfer reactions become very prolific, the properties of the individual states lose their relevance and phase space considerations become more appropriate. Transfer reactions are also expected to be influenced by second-order effects from inelastic processes. The chapter discusses that the strong effects coming from low-lying states mostly have to be included by a coupled channel treatment.
