Isospin Dynamics in Peripheral Heavy Ion Collisions at Fermi Energies

Abstract

We present a detailed study of isospin dynamics in peripheral collisions at Fermi energies. We consider symmetric and mixed collisions of (124,112)Sn isotopes at 35 and 50 AMeV to study the isospin transport between the different reaction components (residues, gas and possibly intermediate mass fragments) and, in particular, the charge equilibration in the mixed system. We evaluate the effects of drift terms due to asymmetry and density gradients, which are directly related to the poorly known value and slope of the symmetry energy below saturation density. We verify the importance of an isoscalar momentum dependence of the mean field, which is found to influence the isospin transport since it changes the reaction times. We finally suggest two observables particularly sensitive to the isovector part of the nuclear equation-of-state: the correlation between isospin equilibration and kinetic energy loss for binary events, and the isospin content of the produced mid-rapidity fragments for neck fragmentation events.

arXiv comment34 pages, 15 figures, Nucl.Phys. A, in press

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Cited by in corpus (34)

• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Constraints on the symmetry energy and neutron skins from experiments and theory
• A way forward in the study of the symmetry energy: experiment, theory, and observation
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• Comparison of heavy-ion transport simulations: Collision integral in a box
• Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
• Isospin emission and flows at high baryon density: a test of the symmetry potential
• Constraints on symmetry energy and nucleon effective mass splitting with Heavy Ion Collisions
• Correlations between emission timescale of fragments and isospin dynamics in ${}^{124}$Sn+${}^{64}$Ni and ${}^{112}$Sn+${}^{58}$Ni reactions at 35 AMeV
• Influence of Transport Variables on Isospin Transport Ratios
• Comparison of Heavy-Ion Transport Simulations: Mean-field Dynamics in a Box
• Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
• Collision dynamics at medium and relativistic energies
• Progress of Quantum Molecular Dynamics model and its applications in Heavy Ion Collisions
• Experimental effects on dynamics and thermodynamics in nuclear reactions on the symmetry energy as seen by the CHIMERA 4$\pi$ detector
• The Influence of in-medium NN cross-sections, symmetry potential and impact parameter on the isospin observables
• Suppression of Charge Equilibration leading to the Synthesis of Exotic Nuclei
• Covariance Analysis of Symmetry Energy Observables from Heavy Ion Collision
• Isospin diffusion in semi-peripheral ${}^{58}Ni$ + ${}^{197}Au$ collisions at intermediate energies (II): Dynamical simulations
• Isospin Distillation with Radial Flow: a Test of the Nuclear Symmetry Energy
• Constraints on the Neutron Skin and the Symmetry Energy from the Anti-analog Giant Dipole Resonance in 208Pb
• Prompt dipole radiation in fusion reactions
• Probing the nuclear equation of state in heavy-ion collisions at Fermi energy in isospin-sensitive exclusive experiments
• Theoretical predictions of experimental observables sensitive to the symmetry energy: Results of the SMF transport model
• Isospin effects and symmetry energy studies with INDRA
• Competition between Coulomb and Symmetry Potential in Semi-peripheral Heavy-ion Collisions
• Nuclear Matter and Nuclear Dynamics
• Revisiting the isospin relaxation time in intermediate-energy heavy-ion collisions
• A new probe to study symmetry energy at low density by deuteron breakup reaction
• Reaction mechanisms in transport theories: a test of the nuclear effective interaction
• Symmetry energy from fragment observables in the canonical thermodynamic model
• Probing the symmetry energy with isospin ratio from nucleons to fragments
• Isospin Diffusion in ${}^{58}$Ni-Induced Reactions at Intermediate Energies
• Dynamical Phase Trajectories in Baryon and Isospin Density Spaces