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Nuclear Theory·nucl-th

Friday·October 13, 2023

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    Role of isospin composition in low energy nuclear fusion

    Richard Gumbel · Christian Ross · A.S. Umar

    We employ a microscopic approach that examines the impact of isospin dynamics on the process of low energy nuclear fusion along an isotope chain and dependence on deformation. Our method utilizes the density constrained time-dependent Hartree-Fock theory (DC-TDHF), where isoscalar and isovector characteristics of the energy density functional (EDF) are examined in turn. This approach is applied to a series of fusion interactions of Yb with increasingly neutron rich isotopes of Calcium. By evaluating the contributions from the isoscalar and isovector components of the EDF, we look to quantify the influence of isospin composition on the conditions under which fusion is most likely to take place. Our findings reveal that, in non-symmetric systems, the isovector dynamics play a significant role. It's typical effect is a reduction in the potential barrier, which turns into enhancement for neutron-rich systems.

    nucl-thPRC(2023)·7 citations
  2. 02

    Semi-relativistic antisymmetrized molecular dynamics for energetic neutron production in intermediate energy heavy-ion reactions

    Q. Hu · G.Y. Tian · R. Wada · X.Q. Liu · W.P. Lin · H. Zheng · Y.P. Zhang · Z.Q. Chen · R. Han · M.R. Huang

    Relativistic corrections have been made in the non-relativistic antisymmetrized molecular dynamics (AMD) simulations to apply to the high energy neutron production in the C+C and O+C collisions at incident energies of 290 and 400 MeV/nucleon. The corrections are made in kinematics alone and no nucleon-nucleon inelastic scatterings nor meson productions are taken into account, and AMD with the relativistic corrections is called semi-relativistic AMD. The three-nucleon collision (3NC) and Fermi boost in the collision processes are taken into account in the non-relativistic AMD. Since the relativistic corrections tend to compensate in each other, the difference between the semi-relativistic and non-relativistic results become small. High energy tails of the available experimental neutron double differential cross sections, especially at larger angles, are well reproduced by AMD with the 3NC term both with non-relativistic and semi-relativistic simulations. These results indicate that the high energy neutrons are dominantly produced by the 3NC process in this incident energy range.

    nucl-thPRC(2023)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE