Skip to Main content Skip to Navigation
Conference papers

Bifurcations in dissipative fermionic dynamics

Abstract : The Boltzmann-Langevin One-Body model (BLOB), is a novel one-body transport approach, based on the solution of the Boltzmann-Langevin equation in three dimensions; it is used to handle large-amplitude phase-space fluctuations and has a broad applicability for dissipative fermionic dynamics. We study the occurrence of bifurcations in the dynamical trajectories describing heavy-ion collisions at Fermi energies. The model, applied to dilute systems formed in such collisions, reveals to be closer to the observation than previous attempts to include a Langevin term in Boltzmann theories. The onset of bifurcations and bimodal behaviour in dynamical trajectories, determines the fragment-formation mechanism. In particular, in the proximity of a threshold, fluctuations between two energetically favourable mechanisms stand out, so that when evolving from the same entrance channel, a variety of exit channels is accessible. This description gives quantitative indications about two threshold situations which characterise heavy-ion collisions at Fermi energies. First, the fusion-to-multifragmentation threshold in central collisions, where the system either reverts to a compact shape, or splits into several pieces of similar sizes. Second, the transition from binary mechanisms to neck fragmentation (in general, ternary channels), in peripheral collisions.
Document type :
Conference papers
Complete list of metadata
Contributor : Sophie Heurteau Connect in order to contact the contributor
Submitted on : Thursday, March 6, 2014 - 11:08:44 AM
Last modification on : Wednesday, October 14, 2020 - 4:00:18 AM

Links full text




P. Napolitani, M. Colonna, M. Di Prima. Bifurcations in dissipative fermionic dynamics. International Symposium on Entrance Channel Effect on the Reaction Mechanism in Heavy Ion Collisions, Nov 2013, Messina, Italy. pp. 012014 ⟨10.1088/1742-6596/515/1/012014⟩. ⟨in2p3-00956297⟩



Record views