Statistical and dynamical aspects in the decay of hot neutron-rich   nuclei
  The signal of isospin-asymmetric phase transition in the evolution of the chemical potential was observed for hot quasi-projectiles produced in the reactions 40,48Ca + 27Al confirming an analogous observation in the lighter system 28Si + 112,124Sn. With increasing mass, the properties of hot quasi-projectiles become increasingly influenced by the secondary emission. Thermodynamical observables exhibit no sensitivity to the different number of missing neutrons in the two reactions 40,48Ca + 27Al, thus providing a signal of dynamical emission of neutrons, which can be related to formation of a very neutron-rich low-density region (neck) between the projectile and target. 
M. Veselsky, A.L. Keksis, G.A. Souliotis, K. Wang, E. Bell, D.V.   Shetty, M. Jandel, S.J. Yennello, Y.G. Ma