Bifurcations in Boltzmann-Langevin One Body dynamics for fermionic systems

Abstract

We investigate the occurrence of bifurcations in the dynamical trajectories depicting central nuclear collisions at Fermi energies. The quantitative description of the reaction dynamics is obtained within a new transport model, based on the solution of the Boltzmann-Langevin equation in three dimensions, with a broad applicability for dissipative fermionic dynamics. Dilute systems formed in central collisions are shown to fluctuate between two energetically favourable mechanisms: reverting to a compact shape or rather disintegrating into several fragments. The latter result can be connected to the recent observation of bimodal distributions for quantities characterising fragmentation processes and may suggest new investigations.

References in corpus (9)

• Nuclear multifragmentation and phase transition for hot nuclei
• Spinodal amplification of density fluctuations in fluid-dynamical simulations of relativistic nuclear collisions
• Bimodal behavior of the heaviest fragment distribution in projectile fragmentation
• Bimodality: a possible experimental signature of the liquid-gas phase transition of nuclear matter
• A new approach to solve the Boltzmann-Langevin equation for fermionic systems
• Fragmentation paths in dynamical models
• New isospin e ffects in central heavy-ion collisions at Fermi energies
• Bimodality - a general feature of heavy ion reactions
• Fluctuations due to the nonlocal character of collisions

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