Isospin fractionation in the nucleon emissions and fragment emissions in the intermediate energy heavy ion collisions

Abstract

The degree of isospin fractionation is measured by $(N/Z{)}_n$ / $(N/Z{)}_{N_{imf}}$, where $(N/Z{)}_n$ and $(N/Z{)}_{N_{imf}}$ are the saturated neutron-proton ratio of nucleon emissions (gas phase) and that of fragment emissions (liquid phase) in heavy ion collision at intermediate energy . The calculated results by using the isospin-dependent quantum molecular dynamics model show that the degree of isospin fractionation is sensitive to the neutron-proton ratio of colliding system but insensitive to the difference between the neutron-proton ratio of target and that of projectile. In particular, the degree of isospin fractionation sensitively depends on the symmetry potential. However its dependences on the isospin dependent in-medium nucleon-nucleon cross section and momentum dependent interaction are rather weak. The nucleon emission (gas phase) mainly determines the dynamical behavior of the degree of isospin fractionation in the isospin fractionation process, compared to the effect of fragment emission. In this case, we propose that $(N/Z{)}_n$ / $(N/Z{)}_{N_{imf}}$ or $(N/Z{)}_n$ can be directly compared with the experimental data so that the information about symmetry potential can be obtained

References in corpus (14)

• Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
• Isospin Fractionation in Nuclear Multifragmentation
• Isotopic Scaling in Nuclear Reactions
• Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
• Determination of the Mean-Field Momentum-Dependence using Elliptic Flow
• Neutron-Proton Differential Flow as a Probe of Isospin-Dependence of Nuclear Equation of State
• Isospin effects in Nuclear Fragmentation
• Isospin-tracing: A probe of non-equilibrium in central heavy-ion collisions
• Nuclear Flow Excitation Function
• Nuclear Stopping as A Probe to In-medium Nucleon-nucleon Cross Section in Intermediate Energy Heavy Ion Collisions
• Proton Differential Elliptic Flow and the Isospin-Dependence of the Nuclear Equation of State
• Asymmetry Effects on Nuclear Fragmentation
• Isospin Effect on the Process of Multifragmentation and Dissipation at Intermediate Energy Heavy Ion Collisions
• Entrance channel dependence and isospin dependence of preequilibrium nucleon emission in intermediate energy heavy ion collisions

Cited by in corpus (10)

• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Reaction Dynamics with Exotic Beams
• Nuclear matter symmetry energy and the neutron skin thickness of heavy nuclei
• Probing the density dependence of symmetry energy via multifragmentation at sub-saturation densities
• Probing the Nuclear Symmetry Energy with Heavy-Ion Reactions Induced by Neutron-Rich Nuclei
• Influence of charge asymmetry and isospin dependent cross-section on elliptical flow
• Nuclear matter symmetry energy from generalized polarizabilities: dependences on momentum, isospin, density and temperature
• Determining the density dependence of the nuclear symmetry energy using heavy-ion reactions
• Revisiting the isospin relaxation time in intermediate-energy heavy-ion collisions
• Constraining the Skyrme effective interactions and the neutron skin thickness of nuclei using isospin diffusion data from heavy ion collisions