Low densities in asymmetric nuclear matter

Abstract

Asymmetric nuclear matter is investigated in the low density region below the nuclear saturation density. Microscopic calculations based on the Dirac Brueckner Hartree-Fock (DBHF) approach with realistic nucleon-nucleon potentials are used to adjust a low density functional. This functional is constructed on a density expansion of the relativistic mean field theory which allows a clear interpretation of the role of the mesons to the equation of state. It is shown that a correction term should be added to the functional in order to take into account the effects beyond the mean field. Two functionals with different corrections are obtained. Those functionals converge to predict a reduction of the spinodal zone in asymmetric nuclear matter by about 15-20% and an isoscalar unstable mode closer to the constant Z/A direction than the functional without correction.

Version2, Paper + figures included, PTH

References in corpus (41)

• The equation of state for nucleon matter and neutron star structure
• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• Recent Progress in Quantum Hadrodynamics
• Alpha cluster condensation in 12C and 16O
• Self-consistent Green's function method for nuclei and nuclear matter
• Model-independent low momentum nucleon interaction from phase shift equivalence
• Kaon production in heavy ion reactions at intermediate energies
• Density Dependent Hadron Field Theory
• Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy Ion Collisions
• Probing the nuclear equation of state by $K^{+}$ production in heavy ion collisions
• Density dependent hadron field theory for asymmetric nuclear matter and exotic nuclei
• Cluster Formation and The Virial Equation of State of Low-Density Nuclear Matter
• Effective Nucleon Masses in Symmetric and Asymmetric Nuclear Matter
• Interplay of Three-Body Interactions in the EOS of Nuclear Matter
• Quantum Monte Carlo Calculations of Neutron Matter
• The Relativistic Dirac-Brueckner Approach to Asymmetric Nuclear Matter
• Covariant representations of the relativistic Brueckner T-matrix and the nuclear matter problem
• Momentum, Density, and Isospin dependence of the Symmetric and Asymmetric Nuclear Matter Properties
• The physics of dense hadronic matter and compact stars
• Low densities in nuclear and neutron matters and in the nuclear surface
• Relativistic Random-Phase Approximation with density-dependent meson-nucleon couplings
• Role of isospin in the nuclear liquid-gas phase transition
• Saturation from nuclear pion dynamics
• Density dependent hadron field theory for hypernuclei
• The alpha-particle in nuclear matter
• Relativistic nuclear model with point-couplings constrained by QCD and chiral symmetry
• Nuclear matter in the crust of neutron stars
• Equation of State of Nuclear Matter at high baryon density
• Nuclear fragmentation: sampling the instabilities of binary systems
• Relativistic Brueckner-Hartree-Fock calculations with explicit intermediate negative energy states
• ${}^1{S}_0$ superfluid phase--transition in neutron matter with realistic nuclear potentials and modern many--body theories
• Instabilities in asymmetric nuclear matter
• Neutron stars with isovector scalar correlations
• Next Generation Relativistic Models
• The Relativistic Dirac-Brueckner Approach to Nuclear Matter
• Pairing in nuclear systems with effective Gogny and V_low-k interactions
• Nuclear Many-Body Dynamics constrained by QCD and Chiral Symmetry
• Isospin fractionation : equilibrium versus spinodal decomposition
• The relativistic self-energy in nuclear dynamics
• Model independent study of the Dirac structure of the nucleon-nucleon interaction
• Super-Symmetry transformation for excitation processes

Cited by in corpus (22)

• Composition and thermodynamics of nuclear matter with light clusters
• The equation of state for dense nucleonic matter from a metamodeling. I. Foundational aspects
• Low-density neutron matter
• Neutron Matter from Low to High Density
• Light nuclei quasiparticle energy shift in hot and dense nuclear matter
• Locating the inner edge of neutron star crust using terrestrial nuclear laboratory data
• Accurate nuclear masses from a three parameter Kohn-Sham DFT approach (BCPM)
• Appearance of Light Clusters in Post-bounce Evolution of Core-Collapse Supernovae
• Khon-Sham Density Functional Inspired Approach to Nuclear Binding
• BCS-BEC crossover of neutron pairs in symmetric and asymmetric nuclear matter
• Constraining mean-field models of the nuclear matter equation of state at low densities
• Energy density functional on a microscopic basis
• Relativistic Effects in Nuclear Matter and Nuclei
• Dirac-Brueckner Hartree-Fock Approach: from Infinite Matter to Effective Lagrangians for Finite Systems
• Spinodal instabilities of asymmetric nuclear matter within the Brueckner--Hartree--Fock approach
• Effect of medium dependent binding energies on inferring the temperatures and freeze-out density of disassembling hot nuclear matter from cluster yields
• Microscopic Study of ${}^1{S}_0$ Superfluidity in Dilute Neutron Matter
• Phase separation in low-density neutron matter
• Spin-polarized low-density neutron matter
• Spinodal Instabilities in Asymmetric Nuclear Matter Based on Realistic $NN$ Interactions
• The role of strangeness and isospin in low density expansions of hadronic matter
• Spinodal instabilities of spin polarized asymmetric nuclear matter