Charge density of O-23,O-24 with isoscalar-isovector coupling terms

摘要

The nonlinear isoscalar-isovector terms which are used to simulate the density dependence of the symmetry energy are considered in the relativistic mean field model. The charge density distributions of O-23,O-24 are investigated by considering the contribution from the isoscalar-isovector couplings. Contrarily to the uncertainty of the neutron radius of Pb-208, a considerable uncertainty exists for the charge radii of O-23,O-24. The data-to-data correlation between the neutron thickness of Pb-208 and that of O-23,O-24 is enhanced by the inclusion of the pNN tensor coupling. This enhancement is closely related to the structural factor, the 2s(1/2), occupation of the out-layer neutrons.