Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8187919 | Physics Letters B | 2013 | 5 Pages |
Abstract
We show that the neutron skin thickness Îrnp of heavy nuclei is uniquely fixed by the symmetry energy density slope L(Ï) at a subsaturation cross density Ïcâ0.11 fmâ3 rather than at saturation density Ï0, while the binding energy difference ÎE between a heavy isotope pair is essentially determined by the magnitude of the symmetry energy Esym(Ï) at the same Ïc. Furthermore, we find a value of L(Ïc) leads to a negative Esym(Ï0)-L(Ï0) correlation while a value of Esym(Ïc) leads to a positive one. Using data on Îrnp of Sn isotopes and ÎE of a number of heavy isotope pairs, we obtain simultaneously Esym(Ïc)=26.65±0.20 MeV and L(Ïc)=46.0±4.5 MeV at 95% confidence level, whose extrapolation gives Esym(Ï0)=32.3±1.0 MeV and L(Ï0)=45.2±10.0 MeV. The implication of these new constraints on the Îrnp of 208Pb and the core-crust transition density in neutron stars is discussed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Zhen Zhang, Lie-Wen Chen,