The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios

Abstract

Emissions of free neutrons and protons from the central collisions of 124Sn+124Sn and 112Sn+112Sn reactions are simulated using the Improved Quantum Molecular Dynamics model with two different density dependence of the symmetry energy in the nuclear equation of state. The constructed double ratios of the neutron to proton ratios of the two reaction systems are found to be sensitive to the symmetry terms in the EOS. The effect of cluster formation is examined and found to affect the double ratios mainly in the low energy region. In order to extract better information on symmetry energy with transport models, it is therefore important to have accurate data in the high energy region which also is affected minimally by sequential decays.

11 pages, 4 figures

References in corpus (3)

• Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State
• Elliptic flow and system size dependence of transition energies at intermediate energies
• In-medium NN cross sections determined from stopping and collective flow in intermediate-energy heavy-ion collisions

Cited by in corpus (25)

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• Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
• Progress of Quantum Molecular Dynamics model and its applications in Heavy Ion Collisions
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• Studies of the equation-of-state of nuclear matter by heavy-ion collisions at intermediate energy in the multi-messenger era
• Competition between Coulomb and Symmetry Potential in Semi-peripheral Heavy-ion Collisions
• Symmetry energy at subsaturation densities and the neutron skin thickness of 208Pb
• Incompressibility and Symmetry Energy of Neutron Star
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• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions