TIME-DEPENDENT HARTREE-FOCK SIMULATION OF THE EXPANSION OF ABRADED NUCLEI

A recent interpretation of the caloric curve based on the expansion of the abraded spectator nucleus is reanalyzed in the framework of the t ime-dependent Hartree-Fock (TDHF) evolution. It is shown that the TDHF dynamics is more complex than a single monopolar collective motion at moderate energy. The inclusion of other important collective degrees of freedom may lead to the dynamical creation of hollow structure. The n, low density regions could be locally reached after a long time by t he creation of these exotic density profiles. In particular the system atic of the minimum density reached during the expansion (the so-calle d turning points) appears to be different.