Dynamical nucleus-nucleus potential and incompressibility of nuclear matter

Zanganeh, V.; Wang, Ning; Ghodsi, O. N.

doi:10.1103/physrevc.85.034601

Cited by 23 publications

(24 citation statements)

References 33 publications

(35 reference statements)

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“…In the previous works [32,33], the parameter set IQ3 is proposed and tested for describing Table I. The parameter set SkP* is generally determined based on the Skyrme force SkP [35] in which the parameters g τ , σ 0…”

Section: A Mean-field In the Modelmentioning

confidence: 99%

“…(4) The momentum dependence of the nucleon-nucleon interaction according to the Skyrme force is involved for the HICs at intermediate energies [30]. It is found that the ImQMD model is successfully applied on HICs at intermediate energies [30][31][32] and heavy-ion fusion reactions between stable nuclei [18,33,34]. It is well known that the symmetry energy plays an important role on the structure of neutron-rich nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Microscopic dynamics simulations of heavy-ion fusion reactions induced by neutron-rich nuclei

Wang

Zhang

et al. 2014

Phys. Rev. C

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The heavy-ion fusion reactions induced by neutron-rich nuclei are investigated with the improved quantum molecular dynamics (ImQMD) model. With a subtle consideration of the neutron skin thickness of nuclei and the symmetry potential, the stability of nuclei and the fusion excitation functions of heavy-ion fusion reactions 16 O+ 76 Ge, 16 O+ 154 Sm, 40 Ca+ 96 Zr and 132 Sn+ 40 Ca are systematically studied. The fusion cross sections of these reactions at energies around the Coulomb barrier can be well reproduced by using the ImQMD model. The corresponding slope parameter of the symmetry energy adopted in the calculations is L ≈ 78 MeV and the surface energy coefficient is g sur = 18 ± 1.5 MeVfm 2 . In addition, it is found that the surface-symmetry term significantly influences the fusion cross sections of neutron-rich fusion systems. For sub-barrier fusion, the dynamical fluctuations in the densities of the reaction partners and the enhanced surface diffuseness at neck side result in the lowering of the fusion barrier. * Electronic address: wangning@gxnu.edu.cn

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Section: A Mean-field In the Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microscopic dynamics simulations of heavy-ion fusion reactions induced by neutron-rich nuclei

Wang

Zhang

et al. 2014

Phys. Rev. C

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“…2 and 3(b). The DC-and DD-TDHF have been applied to extract the collective potentials between two nuclei [22,68] which gave similar features as those obtained in the present work and in other QMD simulations [69,70]. With the collective potential and the momentum, we define the collective energy as…”

Section: B Macroscopic Reduction Procedures For Imqmd Modelmentioning

confidence: 77%

Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions

Wen

Sakata

et al. 2014

Phys. Rev. C

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Applying a macroscopic reduction procedure on the improved quantum molecular dynamics (ImQMD) model, the energy dependences of the nucleus-nucleus potential, the friction parameter, and the random force characterizing a one-dimensional Langevin-type description of the heavy-ion fusion process are investigated. Systematic calculations with the ImQMD model show that the fluctuation-dissipation relation found in the symmetric head-on fusion reactions at energies just above the Coulomb barrier fades out when the incident energy increases. It turns out that this dynamical change with increasing incident energy is caused by a specific behavior of the friction parameter which directly depends on the microscopic dynamical process, i.e., on how the collective energy of the relative motion is transferred into the intrinsic excitation energy. It is shown microscopically that the energy dissipation in the fusion process is governed by two mechanisms: One is caused by the nucleon exchanges between two fusing nuclei, and the other is due to a rearrangement of nucleons in the intrinsic system. The former mechanism monotonically increases the dissipative energy and shows a weak dependence on the incident energy, while the latter depends on both the relative distance between two fusing nuclei and the incident energy. It is shown that the latter mechanism is responsible for the energy dependence of the fusion potential and explains the fading out of the fluctuation-dissipation relation.

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“…It is found that the phase space occupation constraint is an effective approach to improve the momentum distribution of nuclear system [15,16]. In this work, we adopt the parameter set IQ3 [25] (see Table 1) which was applied in the study of heavy-ion fusion reactions at incident energies around the Coulomb barriers.…”

Section: The Model and Some Testsmentioning

confidence: 99%