Neck fragmentation reaction mechanism, Nuclear Physics A, vol.730, issue.3-4, p.329, 2004. ,
DOI : 10.1016/j.nuclphysa.2003.10.022
URL : http://arxiv.org/abs/nucl-th/0309052
Isospin asymmetry (N-Z)/A as a function of the transverse velocity. Biggest fragment (circle), intermediate fragment (squares), smallest fragments (triangles) ,