Fusion and quasi-fission dynamics in nearly-symmetric reactions

Abstract

Some nearly-symmetric fusion reactions are systematically investigated with the improved quantum molecular dynamics (ImQMD) model. By introducing two-body inelastic scattering in the Fermi constraint procedure, the stability of an individual nucleus and the description of fusion cross sections at energies near the Coulomb barrier can be further improved. Simultaneously, the quasi-fission process in ${}^{154}$Sm+${}^{160}$Gd is also investigated with the microscopic dynamics model for the first time. We find that at energies above the Bass barrier, the fusion probability is smaller than $10^{-5}$ for this reaction, and the nuclear contact-time is generally smaller than $1500$ fm/c. From the central collisions of Sm+Gd, the neutron-rich fragments such as ${}^{164,165}$Gd, ${}^{192}$W can be produced in the ImQMD simulations, which implies that the quasi-fission reaction could be an alternative way to synthesize new neutron-rich heavy nuclei.

11 figures

References in corpus (10)

• Surface diffuseness correction in global mass formula
• Theoretical study of the synthesis of superheavy nuclei with Z= 119 and 120 in heavy-ion reactions with trans-uranium targets
• Heavy-ion interaction potential deduced from density-constrained TDHF calculation
• Dissipative dynamics in quasi-fission
• Fusion-fission reactions with modified Woods-Saxon potential
• Boost-invariant mean field approximation and the nuclear Landau-Zener effect
• Microscopic dynamics simulations of heavy-ion fusion reactions induced by neutron-rich nuclei
• Dynamical nucleus-nucleus potential and incompressibility of nuclear matter
• Systematic study of 16O-induced fusions with the improved quantum molecular dynamics model
• Dynamical nucleus-nucleus potential at short distances

Cited by in corpus (8)

• Time-dependent Hartree-Fock calculations for multinucleon transfer and quasifission processes in the ${}^{64}$Ni+${}^{238}$U reaction
• New neutron-rich isotope production in ${}^{154}$Sm+${}^{160}$Gd
• Microscopic description of production cross sections including deexcitation effects
• Microscopic dynamics simulations of multi-nucleon transfer in ${}^{86}$Kr+${}^{64}$Ni at 25 MeV/nucleon
• Shell Effects in Quasi-fission in Reactions Forming 226Th Compound Nucleus
• Theoretical study of fusion reactions ${}^{32}$S + ${}^{94,96}$Zr and ${}^{40}$Ca + ${}^{94,96}$Zr and quadrupole deformation of ${}^{94}$Zr
• Improvement on Fermionic properties and new isotope production in molecular dynamics simulations
• Shielding effects in fusion reactions of proton-halo nucleus