Effect of neutron skin thickness on projectile fragmentation

Abstract

The fragment production in collisions of ${}^{48,50}$Ca+${}^{12}$C at 50 MeV/nucleon are simulated via the Isospin-Dependent Quantum Molecular Dynamics (IQMD) model followed by the {GEMINI code}. {By changing the diffuseness parameter of neutron density distribution to obtain different neutron skin size, the effects of neutron skin thickness (${\delta }_{np}$) on projectile-like fragments (PLF) are investigated. The sensitivity of isoscaling behavior to neutron skin size is studied, from which it is found that the isoscaling parameter $\alpha$ has a linear dependence on ${\delta }_{np}$. A linear dependence between ${\delta }_{np}$ and the mean $N/Z$ [N(Z) is neutron(proton) number] of PLF is obtained as well.} The results show that thicker neutron skin will lead to smaller {isoscaling parameter} $\alpha$ and N/Z. Therefore, it may be probable to extract information of neutron skin thickness from {isoscaling parameter} $\alpha$ and N/Z.

arXiv comment7 pages, 6 figures

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• Many Facets of Strangeness Nuclear Physics with Stored Antiprotons
• Investigating the possibility of extracting neutron-skin thickness in nuclei by their collisions at intermediate energies