Density slope of the nuclear symmetry energy from the neutron skin thickness of heavy nuclei

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Date

2010

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

Abstract

Expressing explicitly the parameters of the standard Skyrme interaction in terms of the macroscopic properties of asymmetric nuclear matter, we show in the Skyrme-Hartree-Fock approach that unambiguous correlations exist between observables of finite nuclei and nuclear matter properties. We find that existing data on neutron skin thickness Delta r(np) of Sn isotopes give an important constraint on the symmetry energy E(sym)(rho(0)) and its density slope L at saturation density rho(0). Combining these constraints with those from recent analyses of isospin diffusion and the double neutron/proton ratio in heavy-ion collisions at intermediate energies leads to a more stringent limit on L approximately independent of E(sym)(rho(0)). The implication of these new constraints on the Delta r(np) of (208)Pb as well as the core-crust transition density and pressure in neutron stars is discussed.

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Journals published by the American Physical Society can be found at http://publish.aps.org/

Keywords

EQUATION-OF-STATE, ISOSPIN PHYSICS, UNSTABLE NUCLEI, MATTER, RADII, PARAMETRIZATION, SPIN, CONSTRAINTS, PARAMETERS, EXCITATION, Physics

Citation

Lie-Wen Chen, Che Ming Ko, Bao-An Li and Jun Xu. Phys.Rev.C 82 024321 2010. "Copyright (2010) by the American Physical Society."