Exotic break-up modes in heavy ion reactions at low energies

Abstract

New reaction mechanisms occurring in heavy ion collisions at low energy (10- 30 MeV/A) are investigated within the Stochastic Mean Field model. We concentrate on the analysis of ternary breakup events, of dynamical origin, occurring in semi-central reactions, where the formation of excited systems in various conditions of shape and angular momentum is observed. We show how this fragmentation mode, which can be considered as a precursor of the neck emission observed at higher beam energies, emerges from the combined action of surface (neck) instabilities and angular momentum effects. Interesting perspectives are opening towards the investigation of this mechanism in neutron-rich (or exotic) systems, with the possibility to access information on the low-density behavior of the nuclear symmetry energy.

arXiv commentsubmitted to Phys. Rev. C

References in corpus (19)

• Reaction Dynamics with Exotic Beams
• Nuclear Quantum Many-Body Dynamics: From Collective Vibrations to Heavy-Ion Collisions
• Nuclear multifragmentation and phase transition for hot nuclei
• Isospin effects in Nuclear Fragmentation
• Neck fragmentation reaction mechanism
• Correlations between emission timescale of fragments and isospin dynamics in ${}^{124}$Sn+${}^{64}$Ni and ${}^{112}$Sn+${}^{58}$Ni reactions at 35 AMeV
• Isospin Dependence of Incomplete Fusion Reactions at 25 Mev/a
• Mass dispersion in transfer reactions with a stochastic mean-field theory
• Bifurcations in Boltzmann-Langevin One Body dynamics for fermionic systems
• Isospin transport in 84Kr + 112,124Sn collisions at Fermi energies
• Symmetry Energy Effects on Fusion Cross Sections
• A new approach to solve the Boltzmann-Langevin equation for fermionic systems
• Fragmentation paths in dynamical models
• Break-up mechanisms in heavy ion collisions at low energies
• Comparison of dynamical multifragmentation models
• Timescale for equilibration of N/Z gradients in dinuclear systems
• Investigation of collective radial expansion and stopping in heavy ion collisions at Fermi energies
• Expansion and evaporation of hot nuclei: Comparison between semi-classical and quantal mean-field approaches
• Angular momentum sharing in dissipative collisions

Cited by in corpus (4)

• Collision dynamics at medium and relativistic energies
• Pre-equilibrium effects in charge-asymmetric low-energy reactions
• Dynamic description of ternary and quaternary splits of heavy nuclear systems in the deep-inelastic regime
• Violent Nuclear Reactions: Large-Amplitude Nuclear Dynamic Phenomena in Fermionic Systems