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Nuclear Theory·nucl-th

Thursday·September 9, 2021

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    Systematic trends of neutron skin thickness versus relative neutron excess

    J. T. Zhang · X. L. Tu · P. Sarriguren · K. Yue · Q. Zeng · Z. Y. Sun · M. Wang · Y. H. Zhang · X. H. Zhou · Yu. A. Litvinov

    Available experimental neutron skin thicknesses of even-even stable Ca, Ni, Sn, Pb, and Cd isotopes are evaluated, and separate trends of neutron skin thickness versus relative neutron excess are firstly observed for different isotopic chains. This phenomenon is quantitatively reproduced by the deformed Skyrme Hartree-Fock BCS model with SLy4 force.

    nucl-thPRC(2021)·27 citations
  2. 02

    Study on deformed halo nucleus Ne with Glauber model based on microscopic self-consistent structures

    Shi-Yi Zhong · Shi-Sheng Zhang · Xiang-Xiang Sun · Michael S. Smith

    We study the exotic deformed nucleus Ne using an approach that combines self-consistent structure and reaction theory. We utilize the fully-relativistic, microscopic deformed Hartree-Bogoliubov theory in continuum (DRHBc) to demonstrate that deformation and pairing correlations give rise to a halo structure with large-amplitude -wave configuration in Ne. We then use the valence nucleon wave functions and angle-averaged density distributions of Ne from this model as input for a Glauber reaction model to study the observables of neutron-rich Neon isotopes and search for halo signatures. Our predictions of the reaction cross sections of these exotic Neon isotopes on a Carbon target can better reproduce the experimental data than those from relativistic mean field model for a spherical shape with resonances and pairing correlations contributions, as well as those from a Skyrme-Hartree-Fock model. The one-neutron removal cross section at 240 MeV/nucleon, the inclusive longitudinal momentum distribution of the Ne, and the valence neutron residues from the Ne breakup reaction are largely improved over previous theoretical predictions and agree well with data. These reaction data indicate a dilute density distribution in coordinate space and are a canonical signature of a halo structure.

    nucl-thSCPMA(2022)·47 citations
  3. 03

    Effects of chiral symmetry restoration on meson and dilepton production in relativistic heavy-ion collisions

    A.B. Larionov🇷🇺 · L. von Smekal🇩🇪

    We include effects of chiral symmetry and its restoration in the kinetic equations for baryon propagation and explore the consequences for , , and dilepton production in heavy-ion collisions at 1-2A GeV. Numerical calculations are performed using the GiBUU microscopic transport model supplemented by the parity-doublet model for the mean fields of the nucleon and the resonance. In this chiral model, a strong dropping of the Dirac mass of the in the high-density stage of a collision leads to a considerable enhancement in the production of this resonance as compared to the standard (non-linear) Walecka model. As the system expands, the Dirac masses of these abundant soft resonances gradually increase and ultimately cross the decay threshold. As a result, an enhanced low-energy production is observed in the calculations with chiral mean fields. Comparing with TAPS data on and production we find that the chiral model improves the agreement for the -spectra of 's at small in heavy colliding systems. A similar enhancement is also observed in the soft production due to chiral symmetry and its partial restoration. The resulting dilepton yields at low and intermediate invariant masses are slightly enhanced due to these chiral effects which further improve the agreement between GiBUU transport simulations and HADES data for C+C at 1A GeV.

    nucl-thhep-exhep-phnucl-exPRC(2022)·12 citations
  4. 04

    Potential model with bound-to-continuum approach for low-energy nucleon radiative capture by C and O

    Le-Anh Nguyen · Nhut-Huan Phan · Minh-Loc Bui

    The nucleon radiative capture reactions are important in pure and applied nuclear physics, especially in nuclear astrophysics. The keV-nucleon radiative capture reactions are studied with C and O targets using the bound-to-continuum potential model in which both scattering and bound states are treated simultaneously and based on the Skyrme Hartree-Fock approximation. The obtained results are shown to be in good agreement with the available experimental data. Alongside astrophysical aspects, the nuclear structure features were revisited for enlarging the prospect of adopting the nucleon radiative capture processes as a spectroscopic tool.

    nucl-thPRC(2021)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE