Dependence of n/p with neutron skin thickness for neutron-rich nuclei

Abstract

The dependence between neutron-to-proton yield ratio ( n / p = Y n / Y p ) and neutron skin thickness ( δ n p ) in neutron-rich projectile induced reactions is investigated within the framework of the Isospin-Dependent Quantum Molecular Dynamics (IQMD) model. By adjusting the diffuseness parameter of neutron density in the Droplet model for the projectile, the relationship of the neutron skin thickness and the corresponding n/p in the collisions is obtained. Those results show that n/p has strong linear correlation with δ n p for neutron-rich Ca and Ni isotopes. It is suggested that n/p may be used as an experimental observable to extract δ n p for neutron-rich nuclei.