Sensitivity of neutron to proton ratio toward the high density behavior of symmetry energy in heavy-ion collisions

Abstract

The symmetry energy at sub and supra-saturation densities has a great importance in understanding the exact nature of asymmetric nuclear matter as well as neutron star, but, it is poor known, especially at supra-saturation densities. We will demonstrate here that the neutron to proton ratios from different kind of fragments is able to determine the supra-saturation behavior of symmetry energy or not. For this purpose, a series of Sn isotopes are simulated at different incident energies using the Isospin Quantum Molecular Dynamics (IQMD) model with either a soft or a stiff symmetry energy for the present study. It is found that the single neutron to proton ratio from free nucleons as well as LCP's is sensitive towards the symmetry energy, incident energy as well as isospin asymmetry of the system. However, with the double neutron to proton ratio, it is true only for the free nucleons. It is possible to study the high density behavior of symmetry energy by using the neutron to proton ratio from free nucleons.

11 Pages, 9 Figures

References in corpus (28)

• Symmetry energy from elliptic flow in 197Au + 197Au
• Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State
• Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
• The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios
• Isospin Diffusion and Equilibration for Sn+Sn collisions at E/A=35 MeV
• Sensitivity of the transverse flow towards symmetry energy
• Neutron-proton elliptic flow difference as a probe for the high density dependence of the symmetry energy
• Effect of the symmetry energy on nuclear stopping and its relation to the production of light charged fragments
• Elliptical flow and isospin effects in heavy-ion collisions at intermediate energies
• Constraints on the density dependence of the symmetry energy from heavy ion collisions
• Equation of state of the neutron star matter, and the nuclear symmetry energy
• Probing the density dependence of symmetry energy via multifragmentation at sub-saturation densities
• Double neutron-proton differential transverse flow as a probe for the high-density behavior of the nuclear symmetry energy
• Triton-${}^3$He relative and differential flows as probes of the nuclear symmetry energy at supra-saturation densities
• A systematic study of the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions with the same neutron/proton ratio but different masses
• Quark-Gluon Plasma at RHIC and the LHC: Perfect Fluid too Perfect?
• Isospin Distillation with Radial Flow: a Test of the Nuclear Symmetry Energy
• Isospin effects on the mass dependence of balance energy
• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Systematic study of the system size dependence of global stopping: Role of momentum dependent interactions and symmetry energy
• Isospin effect in the statistical sequential decay
• Differential isospin-fractionation in dilute asymmetric nuclear matter
• Effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in heavy-ion collisions
• Imprints of Nuclear Symmetry Energy on Properties of Neutron Stars
• Experimental balance energies and isospin-dependent nucleon-nucleon cross-sections
• Rapidity distribution as a probe for elliptical flow at intermediate energies
• Constraining the Symmetry Energy: A Journey in the Isospin Physics from Coulomb Barrier to Deconfinement
• A comparative study of model ingredients: fragmentation in heavy-ion collisions using quantum molecular dynamics model

Cited by in corpus (12)

• Constraining the high-density nuclear symmetry energy with the transverse-momentum dependent elliptic flow
• Revisit of the neutron/proton ratio puzzle in intermediate-energy heavy-ion collisions
• Thermodynamic properties and shear viscosity over entropy density ratio of nuclear fireball in a quantum-molecular dynamics model
• ${}^3$H/${}^3$He ratio as a probe of the nuclear symmetry energy at sub-saturation densities
• Understanding the symmetry energy using data from the ALADIN-2000 Collaboration taken at the GSI Large Neutron Detector
• Chemical Property of Colliding Sources in 124,136Xe and 112,124Sn Induced Collisions in Isobaric Ratio Difference and Isoscaling Methods
• Model dependence of isospin sensitive observables at high densities
• Effect of neutron skin thickness on projectile fragmentation
• The ASY-EOS experiment at GSI: investigating the symmetry energy at supra-saturation densities
• Correlation and isospin dynamics of participant-spectator matter in neutron-rich colliding nuclei at 50 MeV/nucleon
• Correlation between nuclear temperatures and symmetry energy in sub-saturation
• Effects of Symmetry Energy in the Reaction 40Ca+124Sn at 140 MeV/nucleon