The symmetry energy, neutron skin thickness and isovector dipole response of neutron-rich nuclei

The isotopic evolution of the relationship between the symmetry energy at saturation density of nuclear matter ( J ), neutron skin thickness (Δ R ) and relevant observables related to isovector dipole excitations in neutron rich 116−136 Sn isotopes has been investigated in the framework of relativistic nuclear energy density functional theory. The description employs a family of effective interactions with density dependent meson-nucleon couplings (DDME) spanning the range of values J = 30 − 38 MeV.