Exploiting neutron-rich radioactive ion beams to constrain the symmetry energy

Abstract

The Modular Neutron Array (MoNA) and 4 Tm Sweeper magnet were used to measure the free neutrons and heavy charged particles from the radioactive ion beam induced 32Mg + 9Be reaction. The fragmentation reaction was simulated with the Constrained Molecular Dynamics model(CoMD), which demonstrated that the <N/Z> of the heavy fragments and free neutron multiplicities were observables sensitive to the density dependence of the symmetry energy at sub-saturation densities. Through comparison of these simulations with the experimental data constraints on the density dependence of the symmetry energy were extracted. The advantage of radioactive ion beams as a probe of the symmetry energy is demonstrated through examination of CoMD calculations for stable and radioactive beam induced reactions.

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Cited by in corpus (7)

• A way forward in the study of the symmetry energy: experiment, theory, and observation
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• Symmetry energy dependence of long timescale isospin transport
• The neutron array of the compact spectrometer for heavy ion experiments in Fermi energy region
• Production Cross Section of Neutron-Rich Calcium Isotopes in Heavy Ion Collisions
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions