Fusion dynamics of symmetric systems near barrier energies

Abstract

The enhancement of the sub-barrier fusion cross sections was explained as the lowering of the dynamical fusion barriers within the framework of the improved isospin-dependent quantum molecular dynamics (ImIQMD) model. The numbers of nucleon transfer in the neck region are appreciably dependent on the incident energies, but strongly on the reaction systems. A comparison of the neck dynamics is performed for the symmetric reactions ${}^{58}$Ni+${}^{58}$Ni and ${}^{64}$Ni+${}^{64}$Ni at energies in the vicinity of the Coulomb barrier. An increase of the ratios of neutron to proton in the neck region at initial collision stage is observed and obvious for neutron-rich systems, which can reduce the interaction potential of two colliding nuclei. The distribution of the dynamical fusion barriers and the fusion excitation functions are calculated and compared them with the available experimental data.

9 pages, 5 figures

References in corpus (4)

• Energy dependence of nucleus-nucleus potential close to the Coulomb barrier
• Formation of superheavy nuclei in cold fusion reactions
• Production of heavy and superheavy nuclei in massive fusion reactions
• Dynamical analysis on heavy-ion fusion reactions near Coulomb barrier

Cited by in corpus (4)

• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Dynamics of strangeness production in heavy-ion collisions near threshold energies
• Probing the sensitivity of the total nucleus-nucleus reaction cross section at intermediate energies to medium effects and isospin asymmetries