The Nuclear Matter Symmetry Energy at $0.03\leq ρ/ρ_0\leq 0.2$

Details The Nuclear Matter Symmetry Energy at $0.03\leq ρ/ρ_0\leq 0.2$ The Nuclear Matter Symmetry Energy at $0.03\leq ρ/ρ_0\leq 0.2$

2011-10-14

arxiv.org/abs/1110.3341v2

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 6 figures

Scientific paper

Measurements of the density dependence of the free symmetry energy in low density clustered matter have been extended using the NIMROD multi-detector at Texas A&M University. Thermal coalescence models were employed to extract densities, $\rho$, and temperatures, $T$, for evolving systems formed in collisions of 47 $A$ MeV $^{40}$Ar + $^{112}$Sn,$^{124}$Sn and $^{64}$Zn + $^{112}$Sn, $^{124}$Sn. Densities of $0.03 \leq \rho/\rho_0 \leq 0.2$ and temperatures in the range 5 to 10 MeV have been sampled. The free symmetry energy coefficients are found to be in good agreement with values calculated using a quantum statistical model. Values of the corresponding symmetry energy coefficient are derived from the data using entropies derived from the model.

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