Stochastic Semi-Classical Description of Fusion at Near-Barrier Energies

Abstract

Fusion reactions of heavy ions are investigated by employing a simple stochastic semi-classical model which includes the coupling between relative motion and low frequency collective surface modes of colliding ions similarly to the quantal coupled-channels description. The quantal effect enters into the calculation through the initial zero-point fluctuations of the surface vibrations. Good agreement with the result of coupled-channels calculations as well as data is obtained for the fusion cross sections of nickel isotopes. The internal excitations in non-fusing events as well as the fusion time are investigated.

8 pages, 8 figures, Published in Phys. Rev. C

References in corpus (7)

• Hindrance of heavy-ion fusion due to nuclear incompressibility
• Signature of Shallow Potentials in Deep Sub-barrier Fusion Reactions
• Energy dependence of nucleus-nucleus potential close to the Coulomb barrier
• ${}^{64}$Ni+${}^{64}$Ni fusion reaction calculated with the density-constrained time-dependent Hartree-Fock formalism
• TDHF fusion calculations for spherical+deformed systems
• Dynamical deformation effects in subbarrier fusion of ${}^{64}$Ni+${}^{132}$Sn
• Coupled-channels calculations of ${}^{16}$O+${}^{16}$O fusion

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• Symmetry breaking and fluctuations within stochastic mean-field dynamics: importance of initial quantum fluctuations
• Break-up mechanisms in heavy ion collisions at low energies
• Quantal corrections to mean-field dynamics including pairing
• Neutron pair transfer in sub-barrier capture process
• Search of systematic behavior of breakup probability in reactions with weakly bound projectiles at energies around Coulomb barrier
• Microscopic description of pair transfer between two superfluid systems (II): a quantum mixing of Time-Dependent Hartree-Fock Bogolyubov trajectories
• Role of non-collective excitations in low-energy heavy-ion reactions
• Impact of the initial fluctuations on the dissipative dynamics of interacting Fermi systems: A model case study
• Sub-barrier capture reactions with ${}^{16,18}$O and ${}^{40,48}$Ca beams
• Challenges in description of heavy-ion collisions with microscopic time-dependent approaches
• Microscopic description of pair transfer between two superfluid Fermi systems: combining phase-space averaging and combinatorial techniques
• Equilibration in the time-dependent Hartree-Fock approach probed with the Wigner distribution function
• Threshold energy for sub-barrier fusion hindrance phenomenon
• Production of exotic isotopes in complete fusion reactions with radioactive beams
• Effect of nuclear matter incompressibility on the 16O+208Pb system
• Quasifission at extreme sub-barrier energies
• Sub-barrier heavy-ion fusion/capture: Accurate accounting for zero-point quadrupole shape oscillations with realistic nucleus-nucleus potential