Abstract
A relativistic mean field model is used to study the ground-stateproperties of neutron-rich nuclei in Ca isotopes. An additionalisoscalar and isovector nonlinear coupling has been introduced in therelativistic mean field model, which could soften the symmetry energy,while keep the agreement with the experimental data. The sensitivity ofproton and neutron density distributions and single particle states inCa isotopes to the additional isoscalar–isovector nonlinear couplingterm is investigated. We found that the binding energies, the densitydistributions of single particle levels are strongly correlated with thedensity dependence of the symmetric energy in nuclear matter.
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