Constraining the density dependence of the symmetry energy in the nuclear equation of state using heavy ion beams

Abstract

The density dependence of the symmetry energy in the equation of state of asymmetric nuclear matter (N/Z $>$ 1) is important for understanding the structure of systems as diverse as the atomic nuclei and neutron stars. Due to a proper lack of understanding of the basic nucleon-nucleon interaction for matters that are highly asymmetric and at non-normal nuclear density, this very important quantity has remained largely unconstrained. Recent studies using beams from the Cyclotron Institute of Texas A$&$M University, constraining the density dependence of the symmetry energy, is presented. A dependence of the form E${}_{sym}(\rho )$ = C($\rho /{\rho }_o{)}^{\gamma }$, where C = 31.6 MeV and $\gamma$ = 0.69, is obtained from the dynamical and statistical model analysis. Their implications to both astrophysical and nuclear physics studies are discussed.

arXiv commentInvited talk, Proceedings of CAARI 2006, Forth Worth, Texas, Aug 20 -25, 2006

References in corpus (8)

• The equation of state for nucleon matter and neutron star structure
• Determination of the stiffness of the nuclear symmetry energy from isospin diffusion
• Phases of dense matter in neutron stars
• Isospin fractionation and isoscaling in dynamical nuclear collisions
• Isoscaling in Light-Ion Induced Reactions and its Statistical Interpretation
• Symmetry energy and the isospin dependent equation of state
• Symmetry energy and the isoscaling properties of the fragments produced in ${}^{40}$Ar, ${}^{40}$Ca + ${}^{58}$Fe, ${}^{58}$Ni reactions at 25 $-$ 53 MeV/nucleon
• Isospin dependence of 6He+p optical potential and the symmetry energy

Cited by in corpus (3)

• Equation of state of the neutron star matter, and the nuclear symmetry energy
• Neutron star cooling - a challenge to the nuclear mean field
• Folding model study of the charge-exchange scattering to the isobaric analog state and implication for the nuclear symmetry energy