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

Physics – Nuclear Physics – Nuclear Experiment

Scientific paper

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

Scientific paper

10.1016/j.nimb.2007.04.138

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.

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