Effects of isospin and momentum dependent interactions on thermal properties of asymmetric nuclear matter

Abstract

Thermal properties of asymmetric nuclear matter are studied within a self-consistent thermal model using an isospin and momentum dependent interaction (MDI) constrained by the isospin diffusion data in heavy-ion collisions, a momentum-independent interaction (MID), and an isoscalar momentum-dependent interaction (eMDYI). In particular, we study the temperature dependence of the isospin-dependent bulk and single-particle properties, the mechanical and chemical instabilities, and liquid-gas phase transition in hot asymmetric nuclear matter. Our results indicate that the temperature dependence of the equation of state and the symmetry energy are not so sensitive to the momentum dependence of the interaction. The symmetry energy at fixed density is found to generally decrease with temperature and for the MDI interaction the decrement is essentially due to the potential part. It is further shown that only the low momentum part of the single-particle potential and the nucleon effective mass increases significantly with temperature for the momentum-dependent interactions. For the MDI interaction, the low momentum part of the symmetry potential is significantly reduced with increasing temperature. For the mechanical and chemical instabilities as well as the liquid-gas phase transition in hot asymmetric nuclear matter, our results indicate that the boundary of these instabilities and the phase-coexistence region generally shrink with increasing temperature and is sensitive to the density dependence of the symmetry energy and the isospin and momentum dependence of the nuclear interaction, especially at higher temperatures.

arXiv comment21 pages, 29 figures

References in corpus (64)

• Neutron Star Structure and the Equation of State
• Determination of the Equation of State of Dense Matter
• The Physics of Neutron Stars
• Isospin Asymmetry in Nuclei and Neutron Stars
• Reaction Dynamics with Exotic Beams
• Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
• Determination of the stiffness of the nuclear symmetry energy from isospin diffusion
• Phase Transitions in Warm, Asymmetric Nuclear Matter
• Kaon production in heavy ion reactions at intermediate energies
• Isospin Fractionation in Nuclear Multifragmentation
• Nuclear Matter and its Role in Supernovae, Neutron Stars and Compact Object Binary Mergers
• Nuclear matter symmetry energy and the neutron skin thickness of heavy nuclei
• Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies
• Momentum dependence of symmetry potential in asymmetric nuclear matter for transport model calculations
• Isotopic dependence of the giant monopole resonance in the even-A ^{112-124}Sn isotopes and the asymmetry term in nuclear incompressibility
• Effective Nucleon Masses in Symmetric and Asymmetric Nuclear Matter
• Effects of momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei
• The Thermodynamic Model for Nuclear Multifragmentation
• On the nuclear symmetry energy and the neutron skin in neutron-rich nuclei
• The Relativistic Dirac-Brueckner Approach to Asymmetric Nuclear Matter
• Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
• Momentum dependence of the symmetry potential and nuclear reactions induced by neutron-rich nuclei at RIA
• Limiting temperatures and the Equation of State of Nuclear Matter
• Spinodal decomposition of low-density asymmetric nuclear matter
• Near-threshold pion production with radioactive beams at the Rare Isotope Accelerator
• Isospin splitting of the nucleon mean field
• Isotopic Scaling and the Symmetry Energy in Spectator Fragmentation
• Chemical and mechanical instabilities in hot, isospin-asymmetric nuclear matter
• Momentum, Density, and Isospin dependence of the Symmetric and Asymmetric Nuclear Matter Properties
• Density Dependence of the Symmetry energy and the Equation of State of Isospin Asymmetric Nuclear Matter
• Constraining the neutron-proton effective mass splitting in neutron-rich matter
• Transport properties of isospin effective mass splitting
• Double neutron/proton ratio of nucleon emissions in isotopic reaction systems as a robust probe of nuclear symmetry energy
• Role of isospin in the nuclear liquid-gas phase transition
• Effects of momentum-dependent nuclear potential on two-nucleon correlation functions and light cluster production in intermediate energy heavy-ion collisions
• Fast nucleon emission as a probe of the isospin momentum dependence
• A unique spinodal region in asymmetric nuclear matter
• Temperature effects on the nuclear symmetry energy and symmetry free energy with an isospin and momentum dependent interaction
• The Liquid-Gas Phase Transitions in a Multicomponent Nuclear System with Coulomb and Surface Effects
• Tracing the evolution of the symmetry energy of hot nuclear fragments from the compound nucleus towards multifragmentation
• Nuclear fragmentation: sampling the instabilities of binary systems
• Isospin dependence of nucleon effective mass in Dirac Brueckner-Hartree-Fock approach
• Single and double pi^{-}/pi^{+} ratios in heavy-ion reactions as probes of the high-density behavior of the nuclear symmetry energy
• Hot Nuclear Matter Equation of State with a Three-body Force
• Predicting the single-proton/neutron potentials in asymmetric nuclear matter
• Relativistic Structure of the Nucleon Self-Energy in Asymmetric Nuclei
• Effects of isospin and momentum dependent interactions on liquid-gas phase transition in hot asymmetric nuclear matter
• Thermal effects on nuclear symmetry energy with a momentum-dependent effective interaction
• Double neutron-proton differential transverse flow as a probe for the high-density behavior of the nuclear symmetry energy
• Evolution of the symmetry energy of hot neutron-rich matter formed in heavy-ion reactions
• High-energy behavior of the nuclear symmetry potential in asymmetric nuclear matter
• The neutron/proton ratio of squeezed-out nucleons and the high density behavior of the nuclear symmetry energy
• Isospin fractionation : equilibrium versus spinodal decomposition
• On the temperature dependence of the symmetry energy
• Isospin dependence of liquid-gas phase transition in hot asymmetric nuclear matter
• Isospin dependence of nucleon emission and radial flow in heavy-ion collisions induced by high energy radioactive beams
• Nuclear symmetry potential in the relativistic impulse approximation
• Temperature dependence of the nuclear symmetry energy
• Probing Mechanical and Chemical Instabilities in Neutron-Rich Matter
• Differential isospin-fractionation in dilute asymmetric nuclear matter
• Temperature dependence of single-particle properties in nuclear matter
• Nuclear Incompressibility in Asymmetric Systems at Finite Temperature and Entropy
• Isospin Dependence of Mechanical and Chemical Instabilities in Neutron-Rich Matter
• Chemical and mechanical spinodals a unique liquid-gas instability

Cited by in corpus (33)

• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Nuclear constraints on properties of neutron star crusts
• Nucleon Effective Masses in Neutron-Rich Matter
• Locating the inner edge of neutron star crust using terrestrial nuclear laboratory data
• The many facets of the (non relativistic) Nuclear Equation of State
• Progress of Quantum Molecular Dynamics model and its applications in Heavy Ion Collisions
• Thermal properties of asymmetric nuclear matter with an improved isospin- and momentum-dependent interaction
• Probing isospin- and momentum-dependent nuclear effective interactions in neutron-rich matter
• Probing the symmetry energy from the nuclear isoscaling
• Cluster formation in asymmetric nuclear matter: semi-classical and quantal approaches
• Influence of neutron-skin thickness on ${\pi }^{-}/{\pi }^{+}$ ratio in Pb+Pb collisions
• Temperature dependence of the symmetry energy and neutron skins in Ni, Sn, and Pb isotopic chains
• Temperature and momentum dependence of single-particle properties in hot asymmetric nuclear matter
• Compact stars within an asy-soft quark-meson-coupling model
• Effect of splitting of the neutron and proton effective mass on nuclear symmetry energy at finite temperature
• Neutron-proton effective mass splitting in neutron-rich matter and its impacts on nuclear reactions
• Hyperon star in a modified quark meson coupling model
• Density matrix expansion for the MDI interaction
• Dynamical properties of nuclear and stellar matter and the symmetry energy
• Low density instabilities in asymmetric nuclear matter within QMC with $\delta$-meson
• Shear viscosity of neutron-rich nucleonic matter near its liquid-gas phase transition
• Dynamical instabilities of warm $np{e}^{-}$ matter: the $\delta$ meson effects
• Temperature dependence of the volume and surface contributions to the nuclear symmetry energy within the coherent density fluctuation model
• Transition density and pressure in hot neutron stars
• Nuclear Chemical and Mechanical Instability and the Liquid-Gas Phase Transition in Nuclei
• Disentangling effects of collision geometry and symmetry energy in U+U collisions
• Isospin effect on quark matter instabilities
• Shear viscosity of nuclear matter in the spinodal region
• Elimination of influence of neutron-skin size difference of initial colliding nuclei in Pb+Pb collisions
• Sensitive dependence of isotope and isobar distribution of limiting temperatures on symmetry energy
• Transport properties of asymmetric nuclear matter in the spinodal region
• Isospin and momentum dependence of liquid-gas phase transition in hot asymmetric nuclear matter
• Density functional approach to finite temperature nuclear properties and the role of a momentum dependent isovector interaction