Statistical and dynamical aspects in the decay of hot neutron-rich nuclei

A signal of isospin-asymmetric phase transition in the evolution of the chemical potential was observed in hot quasi-projectiles produced in the reactions confirming an analogous observation in the lighter quasi-projectiles observed in the reaction (Veselsky et al., 2004 [1]). With increasing mass, the properties of hot quasi-projectiles become increasingly influenced by secondary emission. Thermodynamical observables exhibit no sensitivity to the different number of missing (undetected) neutrons in the two reactions and provide a signal of dynamical emission of neutrons, which can be related to the formation and disintegration (rupture) of a very neutron-rich low-density region (neck) between the projectile and target.