Enhancement of kinetic energy fluctuations due to expansion

Abstract

Global equilibrium fragmentation inside a freeze out constraining volume is a working hypothesis widely used 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 microscopic correlations, and how a non-confined fragmentation scenario is established. A study of the dynamical evolution of the relative kinetic energy fluctuations was also performed. We found that asymptotic measurements of such observable can be related to the number of decaying channels available to the system at fragmentation time.

6 pages, 4 figures

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Cited by in corpus (9)

• Nuclear multifragmentation and phase transition for hot nuclei
• Liquid-Gas phase transition in nuclei
• Partial energies fluctuations and negative heat capacities
• Fluctuations of fragment observables
• Radial flow has little effect on clusterization at intermediate energies in the framework of the Lattice Gas Model
• Tracking energy fluctuations from fragment partitions in the Lattice Gas model
• Dynamics and thermodynamics of fragment emission from excited sources
• Extended Gibbs ensembles with flow
• Expansion dynamics of Lennard-Jones systems