Fragmentation paths in dynamical models

Abstract

We undertake a quantitative comparison of multi-fragmentation reactions, as modeled by two different approaches: the Antisymmetrized Molecular Dynamics (AMD) and the momentum-dependent stochastic mean-field (SMF) model. Fragment observables and pre-equilibrium (nucleon and light cluster) emission are analyzed, in connection to the underlying compression-expansion dynamics in each model. Considering reactions between neutron-rich systems, observables related to the isotopic properties of emitted particles and fragments are also discussed, as a function of the parametrization employed for the isovector part of the nuclear interaction. We find that the reaction path, particularly the mechanism of fragmentation, is different in the two models and reflects on some properties of the reaction products, including their isospin content. This should be taken into account in the study of the density dependence of the symmetry energy from such collisions.

11 pages, 13 figures, submitted to Phys. Rev. C

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Cited by in corpus (13)

• A way forward in the study of the symmetry energy: experiment, theory, and observation
• Dynamics of clusters and fragments in heavy-ion collisions
• Influence of Transport Variables on Isospin Transport Ratios
• Bifurcations in Boltzmann-Langevin One Body dynamics for fermionic systems
• Liquid-Gas phase transition in nuclei
• Collision dynamics at medium and relativistic energies
• Experimental effects on dynamics and thermodynamics in nuclear reactions on the symmetry energy as seen by the CHIMERA 4$\pi$ detector
• New isospin e ffects in central heavy-ion collisions at Fermi energies
• Theoretical predictions of experimental observables sensitive to the symmetry energy: Results of the SMF transport model
• Heavy-ion Collisions: Direct and indirect probes of the density and temperature dependence of Esym
• Nuclear multifragmentation time-scale and fluctuations of largest fragment size
• One-body Langevin dynamics in heavy-ion collisions at intermediate energies
• Exotic break-up modes in heavy ion reactions at low energies