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.
@article{arxiv.0801.3140,
title = {Statistical and dynamical aspects in the decay of hot neutron-rich nuclei},
author = {M. Veselsky and A. L. Keksis and G. A. Souliotis and K. Wang and E. Bell and D. V. Shetty and M. Jandel and S. J. Yennello and Y. G. Ma},
journal= {arXiv preprint arXiv:0801.3140},
year = {2014}
}