Erratum: Mass parameters for relative and neck collective motions in heavy ion fusion reactions [Phys. Rev. C<b>79</b>, 024614 (2009)]

Zhao, Kai; Li, Zhuxia; Wu, Xizhen; Zhao, Zhanzheng

doi:10.1103/physrevc.79.049901

Cited by 10 publications

(22 citation statements)

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“…of a heavy system [20], of mass parameters [21], and of the strongly damped process of 238 U+ 238 U [22,23]. In this paper we carefully investigate the kinetic energies of nuclei based on the extended Thomas-Fermi approximation with which the dynamical fusion barrier is accurately obtained.…”

Section: Introductionmentioning

confidence: 99%

Dynamical nucleus-nucleus potential at short distances

Jiang

Wang

et al. 2010

Phys. Rev. C

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The dynamical nucleus-nucleus potentials for fusion reactions 40Ca+40Ca, 48Ca+208Pb and 126Sn+130Te are studied with the improved quantum molecular dynamics (ImQMD) model together with the extended Thomas-Fermi approximation for the kinetic energies of nuclei. The obtained fusion barrier for 40Ca+40Ca is in good agreement with the extracted fusion barrier from the measured fusion excitation function, and the depth of the fusion pockets are close to the results of time-dependent Hartree-Fock calculations. The energy dependence of fusion barrier is also investigated. For heavy fusion system, the fusion pocket becomes shallow and almost disappears for symmetric systems and the obtained potential at short distances is higher than the adiabatic potential.Comment: 6 figures, accepted for publication in Phys. Rev.

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Section: Introductionmentioning

confidence: 99%

Dynamical nucleus-nucleus potential at short distances

Jiang

Wang

et al. 2010

Phys. Rev. C

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“…In preliminary versions of this work reported in conferences [31][32][33][34] and in Refs. [35,36], it is shown on dynamical arguments that it is correct. Finally, in [15,16] the neck degree of freedom is not mentioned.…”

Section: Fusion Of Heavy Ions Is Largely Hindered By Comparisonmentioning

confidence: 99%

“…[35] shows the time evolution of the neck calculated with a microscopic model and it appears that it is also shorter than the time characterizing the evolution of the relative distance. The velocity is peaked as function of time and vanishes on a time scale of the order of 100 fm/c or 0.5 /MeV, which is similar to our result.…”

Section: Simplified Neck Dynamicsmentioning

confidence: 99%

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Fusion hindrance of heavy ions: Role of the neck

et al. 2011

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Fusion of heavy ions is largely hindered because of the appearance of an inner barrier between the contact point of the two colliding nuclei and the compound nucleus. But there are still quantitative ambiguities on the size of the barrier and on the role of the dissipation. In this paper we stress the importance of the neck of the composite system on the hindrance of the fusion of heavy nuclei. We show that the "denecking" process is very quick compared to the other collective degrees of freedom as the relative distance. This behavior of the neck will change the potential seen by the relative distance on the way to fusion and its effective initial value through a dynamical coupling. Both effects contribute to the hindrance of fusion.

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“…After the two nuclei contact each other, µ becomes dependent on the relative distance R and E c.m. [22,23,64]. As our discussion is limited to regions of R and E c.m.…”

Section: B Macroscopic Reduction Procedures For Imqmd Modelmentioning

confidence: 99%

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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Erratum: Mass parameters for relative and neck collective motions in heavy ion fusion reactions [Phys. Rev. C79, 024614 (2009)]

Abstract: Erratum: Mass parameters for relative and neck collective motions in heavy ion fusion reactions [Phys. Rev. C 79, 024614 (2009)]

Cited by 10 publications

References 1 publication

Dynamical nucleus-nucleus potential at short distances

Dynamical nucleus-nucleus potential at short distances

Fusion hindrance of heavy ions: Role of the neck

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

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