Probing the isospin dependent mean field and nucleon nucleon cross section in the medium by the nucleon emissions

Abstract

We study the isospin effects of the mean field and two-body collision on the nucleon emissions at the intermediate energy heavy ion collisions by using an isospin dependent transport theory. The calculated results show that the nucleon emission number $N_n$ depends sensitively the isospin effect of nucleon nucleon cross section and weakly on the isospin dependent mean field for neutron-poor system in higher beam energy region . In particular, the correlation between the medium correction of two-body collision and the momentum dependent interaction enhances the dependence of nucleon emission number $N_n$ on the isospin effect of nucleon nucleon cross section. On the contrary, the ratio of the neutron proton ratio of the gas phase to the neutron proton ratio of the liquid phase, i.e., the degree of isospin fractionation $<(N/Z{)}_{gas}{>}_b/<(N/Z{)}_{liq}{>}_b$ depends sensitively on the isospin dependent mean field and weakly on the isospin effect of two-body collision for neutron-rich system in the lower beam energy region. In this case, $N_n$ and $<(N/Z{)}_{gas}{>}_b/<(N/Z{)}_{liq}{>}_b$ are the probes for extracting the information about the isospin dependent nucleon nucleon cross section in the medium and the isospin dependent mean field,respectively.

arXiv comment4 pages,4 figures

References in corpus (16)

• 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
• Isospin non-equilibrium in heavy-ion collisions at intermediate energies
• Asymmetry Effects on Nuclear Fragmentation
• Isospin effect on nuclear stopping in intermediate energy Heavy Ion Collisions
• 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 (1)

• Isoscaling behavior in the Isospin dependent Quantum Molecular Dynamics model