Charge density of light exotic nuclei and $\rho NN$ tensor coupling

Abstract

We use a relativistic mean field model to study the charge density distributions of exotic oxygen isotopes. Nonlinear isoscalar-isovector terms which are not constrained by the present data are considered and the $\rho NN$ tensor coupling that does not affect the symmetry energy in the mean field model is included. Strong correlations between the neutron radius of ${}^{208}$Pb and the charge radius of ${}^{12,13,23,24}$O are found. The $\rho NN$ tensor coupling explicitly enhances the radius correlations between ${}^{23,24}$O and ${}^{208}$Pb. This enhancement is due to the neutron occupation of the orbital $2s_{1/2}$. The charge radius is sensitive to the change of the density dependence of the symmetry energy as the isotope goes towards the proton drip line.

13 pages, 4 figures

Cited by in corpus (2)

• Neutron-skin thickness of finite nuclei in relativistic mean-field models with chiral limits
• Roles of isoscalar hyperons in probing the density dependence of the nuclear symmetry energy