Constraining the symmetry energy at subsaturation densities using isotope binding energy difference and neutron skin thickness

Zhen Zhang, Lie-Wen Chen

We show that the neutron skin thickness $\Delta r_{np}$ of heavy nuclei is uniquely fixed by the symmetry energy density slope $L(\rho )$ at a subsaturation cross density ${\rho }_c\approx 0.11$…