Nuclear matter symmetry energy at 0.03⩽ρ/ρ0⩽0.2 Academic Article uri icon


  • Measurements of the density dependence of the symmetry free energy in low-density clustered matter have been extended using the Neutron Ion Multidetector for Reaction Oriented Dynamics at Texas A&M University. Thermal coalescence models were employed to extract densities ρ and temperatures T for evolving systems formed in collisions of 47A MeV 40Ar+112Sn,124Sn and 64Zn+112Sn, 124Sn. Densities of 0. 03≤ρ/ρ0≤0.2 and temperatures in the range 5-10 MeV have been sampled. The symmetry free energy coefficients are found to be in good agreement with values calculated using a quantum statistical model. Values of the corresponding symmetry free energy coefficient are derived from the data using entropies derived from the model. © 2012 American Physical Society.

author list (cited authors)

  • Wada, R., Hagel, K., Qin, L., Natowitz, J. B., G., Y., Röpke, G., ... Majka, Z.

citation count

  • 42

publication date

  • June 2012