Symmetry Energy as a Function of Density and Mass

Details Symmetry Energy as a Function of Density and Mass Symmetry Energy as a Function of Density and Mass

2007-08-21

arxiv.org/abs/0708.2830v1

AIPConf.Proc.947:301-306,2007

Physics

Nuclear Physics

Nuclear Theory

6 pages, 4 figures, contribution to the VII Latin American Symposium on Nuclear Physics and Applications, Cusco, Peru, June 11

Scientific paper

10.1063/1.2813821

Energy in nuclear matter is, in practice, completely characterized at different densities and asymmetries, when the density dependencies of symmetry energy and of energy of symmetric matter are specified. The density dependence of the symmetry energy at subnormal densities produces mass dependence of nuclear symmetry coefficient and, thus, can be constrained by that latter dependence. We deduce values of the mass dependent symmetry coefficients, by using excitation energies to isobaric analog states. The coefficient systematic, for intermediate and high masses, is well described in terms of the symmetry coefficient values of a_a^V=(31.5-33.5) MeV for the volume coefficient and a_a^S=(9-12) MeV for the surface coefficient. These two further correspond to the parameter values describing density dependence of symmetry energy, of L~95 MeV and K_{sym}~25 MeV.

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