Entrance channel dependence and isospin dependence of preequilibrium nucleon emission in intermediate energy heavy ion collisions

Abstract

Using isospin dependent quantum molecular dynamical model, the studies of the isospin effect on preequilibrium nucleon emission in heavy ion collisions under different entrance channel conditions show that the ratio of preequilibrium neutron number to proton number depends strongly on symmetry potential, beam energy, and the ratio of neutron to proton of the colliding system, but weakly on isospin dependent in-medium nucleon-nucleon cross sections, impact parameter, Pauli potential, and momentum dependent interaction in the energy region from 45MeV/u up to 150 MeV/u where the dynamics is dominated by nucleon-nucleon collisions. In addition, the ratio of preequilibrium neutron number to proton number for a neutron-rich colliding system is larger than the initial value of the ratio of the colliding system, but the ratio for a neutron-deficient system is less than the initial value.

Cited by in corpus (10)

• Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies
• Probing the density dependence of the symmetry potential in intermediate energy heavy ion collisions
• Probing the isospin dependence of the in-medium nucleon-nucleon cross sections with radioactive beams
• Isospin Effect on the Process of Multifragmentation and Dissipation at Intermediate Energy Heavy Ion Collisions
• Isospin fractionation in the nucleon emissions and fragment emissions in the intermediate energy heavy ion collisions
• Influence of a momentum dependent interaction on the isospin dependence of fragmentation and dissipation in intermediate energy heavy ion collisions
• Probing the Isospin Dependent In-Medium Nucleon-Nucleon Cross Section by Nucleon Emissions
• Influence of medium correction of nucleon nucleon cross section on the fragmentation and nucleon emission
• Probing the isospin dependent mean field and nucleon nucleon cross section in the medium by the nucleon emissions
• Medium influence of the nucleon nucleon cross section on the fragmentation