2004/05/06 by M. Colonna, G. Fabbri, M. Di Toro +3 · 1 citation
Physics and Astronomy · #Atomic physics #Computer network #Computer science #Excited state #Fragmentation (computing) #Laser-Plasma Interactions and Diagnostics #Nuclear physics research studies #Operating system #Path (computing) #Physics #Quantum chaos and dynamical systems #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2004.07.001
published as Nucl.Phys. A742 (2004) 337-347 · 13 pages, 7 figures, submitted to Nucl.Phys.A
arxiv created 2004/05/06 · openalex publication_date 2004/07/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We perform a study of the fragmentation path of excited nuclear sources, within the framework of a stochastic mean-field approach. We consider the reaction 129Xe + 119Sn at two beam energies: 32 and 50 MeV/A, for central collisions. It is observed that, after the compression phase the system expands towards a dilute configuration from which it may recontract or evolve into a bubble-like structure. Then fragments are formed through the development of volume and/or surface instabilities. The two possibilities co-exist at 32 MeV/A, leading to quite different fragment partitions, while at 50 MeV/A the hollow configuration is observed in all events. Large variances are recovered in a way fully consistent with the presence of spinodal decomposition remnants. Kinematical properties of fragments are discussed and suggested as observables very sensitive to the dominant fragment production mechanism. A larger radial collective flow is observed at 50 MeV/A, in agreement with experiments.