Role of angular momentum in the production of complex fragments in fusion and quasifission reactions

Kalandarov, Sh. A.; Adamian, G. G.; Antonenko, N. V.; Scheid, W.

doi:10.1103/physrevc.83.054611

Cited by 35 publications

(7 citation statements)

References 30 publications

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“…It is known that the shell and pairing effects play a key role for the fission and quasi-fission process. It is found that the quasi-fission mass distribution in fusion reactions leading to the synthesis of super-heavy nuclei can be reasonably well described by the driving potential in the dinuclear system (DNS) model [17,18], since the shell effects of reaction system are effectively involved in the driving potential via the Q-value of the system. It is therefore interesting to investigate the mass distribution of a fissile system based on its driving potential.…”

Section: Introductionmentioning

confidence: 99%

Pre-neutron-emission mass distributions for low-energy neutron-induced actinide fission

Sun

Wang

2012

Phys. Rev. C

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According to the driving potential of a fissile system, we propose a phenomenological fission potential for a description of the pre-neutron emission mass distributions of neutron-induced actinide fission. Based on the nucleus-nucleus potential with the Skyrme energy-density functional, the driving potential of the fissile system is studied considering the deformations of nuclei. The energy dependence of the potential parameters is investigated based on the experimental data for the heights of the peak and valley of the mass distributions. The pre-neutron emission mass distributions for reactions 238 U(n, f), 237 Np(n, f), 235 U(n, f), 232 Th(n, f) and 239 Pu(n, f) can be reasonably well reproduced. Some predictions for these reactions at unmeasured incident energies are also presented.

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Section: Introductionmentioning

confidence: 99%

Pre-neutron-emission mass distributions for low-energy neutron-induced actinide fission

Sun

Wang

2012

Phys. Rev. C

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“…At high angular momenta some dinuclear scission configurations are energetically more favorable than the compound nucleus configuration and the fissionlike fragments in the 36 Ar(E c.m. = 152 to 200 MeV) + 144 Sm reaction can be mainly produced by quasifission (but not by a fusion-fission process) [9]. The improved scission-point model [4,8] provides a good description of the experimental data on fission of 180 Hg as well as of 198 Hg (see [4]).…”

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confidence: 99%

Isospin dependence of mass-distribution shape of fission fragments of Hg isotopes

et al. 2013

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Using an improved scission-point model, the mass distributions are calculated for induced fission of even Hg isotopes with mass numbers A=174 to 196. With increasing A of a fissioning AHg nucleus the mass distribution evolves from symmetric for 174Hg, to asymmetric for isotopes close to 180Hg, and back to more symmetric for 192,194,196Hg. In the fissioning Hg isotopes their excitation energy weakly influences the shape of the mass distribution. In 180,184Hg, the mass distributions of fission fragments remain asymmetric even at high excitation energies

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“…The fission observables could be studied fully stochastically or using the thermodynamic properties. The dinuclear system model based on the thermodynamics with Boltzmann factor included [32][33][34][35] allows to calculate cross-section of fusion, fission and also evaporation or quasi-fission. The potential energy surface is obtained with two-center shell model (TCSM) and the emission barriers for particles, clusters is obtained with Skyrme-type nucleon-nucleon interaction.…”

Section: Introductionmentioning

confidence: 99%

Fission fragment distributions within dynamical approach

et al. 2017

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The review covers recent developments and achievements in the dynamical description of fission process at high excitation energy. It is shown that the dynamical approach based on multidimensional Langevin equations combined with the statistical description of nuclear decay by particles evaporation is capable of fairly well describing the formation of fission fragment mass-energy, charge, and angular distributions of fission fragments in coincidence with the pre-and post-scission particle emission. The final yields of fission and evaporation residues channels products could be obtained. The detailed description of fission dynamics allows studying different stages of fission process, indicating the most important ingredients governing fission process and studying in detail such fundamental nuclear properties as nuclear viscosity and fission timescale. The tasks and perspectives of multidimensional dynamical approach are also discussed.

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Role of angular momentum in the production of complex fragments in fusion and quasifission reactions

Cited by 35 publications

References 30 publications

Pre-neutron-emission mass distributions for low-energy neutron-induced actinide fission

Pre-neutron-emission mass distributions for low-energy neutron-induced actinide fission

Isospin dependence of mass-distribution shape of fission fragments of Hg isotopes

Fission fragment distributions within dynamical approach

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