Enhancement of kinetic energy fluctuations due to expansion

A. CHERNOMORETZ; F. GULMINELLI; M. J. ISON; C. O. DORSO

Physical Review C

American Physical Society (APS)

Lugar: NY; Año: 2004 vol. 69 p. 34610 - 346106

0556-2813

Global equilibrium fragmentation inside a freeze-out constraining volume is a working hypothesis widelyused in nuclear fragmentation statistical models. In the framework of classical Lennard-Jones molecular dynamics,we study how the relaxation of the fixed volume constraint affects the posterior evolution of microscopiccorrelations, and how a nonconfined fragmentation scenario is established. A study of the dynamicalevolution of the relative kinetic energy fluctuations was also performed. We found that asymptotic measurementsof such an observable can be related to the number of decaying channels available to the system atfragmentation time.