In simulated intermediate-energy tin collisions, the free neutron-to-proton yield ratio is more sensitive to the symmetry potential than to the initial neutron-skin thickness in most kinematics.
The influence of the neutron skin and the asymmetry energy on the $\pi^-/\pi^+$ ratio
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abstract
We use the Isospin Quantum Molecular Dynamics model (IQMD) to analyze the centrality dependence of the isospin ratio of pions, $\pi^-/\pi^+$. We find that the density dependence of the asymmetry potential, the Pauli blocking of the $\Delta$-decay and the thickness of the neutron skin influence in different ways this observable. Using the centrality dependence of this ratio at different beam energies we can disentangle the different contributions and open the way for their experimental determination.
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Investigating the possibility of extracting neutron-skin thickness in nuclei by their collisions at intermediate energies
In simulated intermediate-energy tin collisions, the free neutron-to-proton yield ratio is more sensitive to the symmetry potential than to the initial neutron-skin thickness in most kinematics.