Fluctuations and dynamical instabilities in heavy-ion reactions

✍ Scribed by M. Colonna; M. Di Toro; A. Guarnera; S. Maccarone; M. Zielinska-Pfabé; H.H. Wolter

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 642 KB
• Volume: 642
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00542-9

✦ Synopsis

We present a new method to implement fluctuations in the mean-field dynamics. Assuming local thermal equilibrium, we calculate the fluctuation amplitude according to the statistical value and we determine the associated density variance. The method can be applied to study the role of fluctuations in both stable and unstable dynamics. While in stable cases fluctuations are only responsible for the width of the distributions around mean values, their role become crucial in unstable situations, where bifurcations occur and different reaction exit channels are possible. We illustrate this point by describing the break-up of di-nuclear systems exhibiting neck instabilities. (~ 1998 Elsevier Science B.V.