Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model

doi:10.1016/j.nuclphysa.2019.121640

This content will become publicly available on October 1, 2020

Title: Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model

Full Record
Other Related Research

Abstract

Fusion dynamics and the onset of quasi-fission in reactions, leading to production of superheavy nuclei are investigated using the constrained molecular dynamics model. Constraints on the parameters of the nuclear equation of state are derived from experimental fusion probabilities. Here, the obtained constraint on the modulus of incompressibility of nuclear matter K ₀ = 240 –260 MeV is consistent with the results of previous study using the Boltzmann-Uehling-Uhlenbeck equation and also with constraints derived using the recent neutron star binary collision event GW170817. Unlike the modulus of incompressibility of symmetric nuclear matter, the stiffness of the density-dependence of symmetry energy influences the fusion probability only weakly.

Authors:

^[1]; Veselsky, Martin ^[2]; Souliotis, G. A. ^[3]; Bonasera, A. ^[4]

Slovak Academy of Sciences, Bratislava (Slovakia)
Czech Technical Univ., Prague (Czech Republic)
National and Kapodistrian Univ. of Athens, Athens (Greece)
Texas A & M Univ., College Station, TX (United States)

Publication Date:: 2019-10-01

Research Org.:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1572722

Grant/Contract Number:: NA0003841

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Physics. A

Additional Journal Information:: Journal Volume: 992; Journal Issue: C; Journal ID: ISSN 0375-9474

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Nucleus-nucleus collisions; Nuclear equation of state; Quasifission; Superheavy nuclei

Citation Formats


                    Klimo, Jozef, Veselsky, Martin, Souliotis, G. A., and Bonasera, A. Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model.  United States: N. p., 2019. 
        Web.  doi:10.1016/j.nuclphysa.2019.121640.

Copy to clipboard


                    Klimo, Jozef, Veselsky, Martin, Souliotis, G. A., & Bonasera, A. Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model.  United States.  doi:10.1016/j.nuclphysa.2019.121640.

Copy to clipboard


                    Klimo, Jozef, Veselsky, Martin, Souliotis, G. A., and Bonasera, A. Tue .  
        "Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model".  United States.  doi:10.1016/j.nuclphysa.2019.121640.

Copy to clipboard


                    
@article{osti_1572722,

  title        = {Simulation of fusion and quasi-fission in nuclear reactions leading to production of superheavy elements using the Constrained Molecular Dynamics model},

  author       = {Klimo, Jozef and Veselsky, Martin and Souliotis, G. A. and Bonasera, A.},

  abstractNote = {Fusion dynamics and the onset of quasi-fission in reactions, leading to production of superheavy nuclei are investigated using the constrained molecular dynamics model. Constraints on the parameters of the nuclear equation of state are derived from experimental fusion probabilities. Here, the obtained constraint on the modulus of incompressibility of nuclear matter K0 = 240 –260 MeV is consistent with the results of previous study using the Boltzmann-Uehling-Uhlenbeck equation and also with constraints derived using the recent neutron star binary collision event GW170817. Unlike the modulus of incompressibility of symmetric nuclear matter, the stiffness of the density-dependence of symmetry energy influences the fusion probability only weakly.},

  doi          = {10.1016/j.nuclphysa.2019.121640},

  journal      = {Nuclear Physics. A},

  number       = C,

  volume       = 992,

  place        = {United States},

  year         = {2019},

  month        = {10}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

This content will become publicly available on October 1, 2020

Publisher's Version of Record

DOI: 10.1016/j.nuclphysa.2019.121640

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

The Peculiarities of the Production and Decay of Superheavy Nuclei

Journal Article Itkis, M. G. ; Bogachev, A. A. ; Itkis, I. M. ; ... - AIP Conference Proceedings

The interest in the study of the fission process of superheavy nuclei mainly deals with the opportunity to obtain information about the cross-section of the compound nucleus (CN) formation at excitation energies E*{approx_equal}15-30 MeV. It allows one to estimate the survival probability of the superheavy composite system after evaporation of 1-3 neutrons, i.e. in 'cold' or 'warm' fusion reactions. However, in order to solve this problem deeper understanding of the coalescence processes between colliding nuclei, the competition between fusion-fission and quasi-fission processes is needed. The characteristics of both processes, their manifestation in the experimental observables and the relative contribution tomore »« less
DOI: 10.1063/1.2338383
Constraining the high-density behavior of the nuclear equation of state from strangeness production in heavy-ion collisions

Journal Article Feng Zhaoing - Physical Review. C, Nuclear Physics

The dynamics of pions and strange particles in heavy-ion collisions in the region of 1A GeV energies is investigated by the lanzhou quantum molecular dynamics model for probing the nuclear equation of state at suprasaturation densities. The total multiplicities and the ratios obtained in {sup 197}Au+{sup 197}Au over {sup 12}C+{sup 12}C systems are calculated for selected Skyrme parameters SkP, SLy6, Ska, and SIII, which correspond to different modulus of incompressibility of symmetric nuclear matter and different cases of the stiffness of symmetry energy. A decreasing trend of the excitation functions of the ratios for strange particle production with increasing incidentmore »« less
DOI: 10.1103/PHYSREVC.83.067604
Can neutrons from nucleus-nucleus collisions probe the nuclear-matter equation of state?

Journal Article Madey, R. - Bulletin of the American Physical Society

The nuclear matter equation-of-state (EOS) is needed for understanding nuclear matter under extreme conditions of density, temperature, and pressure that are relevant for astrophysical objects such as supernovae and neutron stars. The EOS is a crucial ingredient also in modern theories of relativistic nucleus-nucleus collisions. Bevalac experiment 848H was designed to probe the EOS by measuring triple-differential cross sections for neutrons from high-multiplicity collisions of equal-mass nuclei as a function of mass number and bombarding energy. The triple-differential cross sections for neutrons with positive center-of-mass rapidities are peaked at an azimuthal angle of 0{degrees} relative to the reaction plane; themore »« less
Maximum azimuthal anisotropy of neutrons from Nb-Nb collisions at 400[ital A] MeV and the nuclear equation of state

Journal Article Elaasar, M. ; Madey, R. ; Zhang, W.M. ; ... - Physical Review, C (Nuclear Physics); (United States)

We measured the first azimuthal distributions of triple-differential cross sections of neutrons emitted in heavy-ion collisions, and compared their maximum azimuthal anisotropy ratios with Boltzmann-Uehling-Uhlenbeck (BUU) calculations with a momentum-dependent interaction. By restricting the analysis to free neutrons, the BUU calculations of the triple-differential cross sections for positive rapidity neutrons emitted at polar angles from 7[degree] to 27[degree] agree generally with the data; however, the polar-angle dependence of the maximum azimuthal anisotropy ratio for these free neutrons is insensitive to the size of the nuclear incompressibility modulus [ital K] characterizing the nuclear matter equation of state.
DOI: 10.1103/PhysRevC.49.R10
Low-Energy Fusion-Fission Dynamics of Heavy Nuclear Systems

Journal Article Zagrebaev, Valery ; Greiner, Walter - AIP Conference Proceedings

A new approach is proposed for a unified description of strongly coupled deep-inelastic (DI) scattering, fusion, fission, and quasi-fission (QF) processes of heavy ion collisions. A unified driving-potential and a unified set of dynamic Langevin-type equations of motion are used in this approach. This makes it possible to perform a full (continuous) time analysis of the evolution of heavy nuclear systems, starting from the approaching stage, moving up to the formation of the compound nucleus or emerging into two final fragments. The calculated mass, charge, energy and angular distributions of the reaction products agree well with the corresponding experimental datamore »« less
DOI: 10.1063/1.2338397

Similar Records