Determination of the Stiffness of the Nuclear Symmetry Energy from Isospin Diffusion

2004/07/31 by Lie-Wen Chen, Che Ming Ko, Bao-An Li · 32 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #astro-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevlett.94.032701

published as Phys.Rev.Lett.94:032701,2005 · 4 pages, 4 figures, 1 table, revised version, to appear in PRL

arxiv created 2004/12/23 · openalex publication_date 2005/01/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

With an isospin- and momentum-dependent transport model, we find that the degree of isospin diffusion in heavy-ion collisions at intermediate energies is affected by both the stiffness of the nuclear symmetry energy and the momentum dependence of the nucleon potential. Using a momentum dependence derived from the Gogny effective interaction, recent experimental data from NSCL-MSU on isospin diffusion are shown to be consistent with a nuclear symmetry energy given by E(sym)(rho) approximately 31.6(rho/rho(0))(1.05) at subnormal densities. This leads to a significantly constrained value of about -550 MeV for the isospin-dependent part of the isobaric incompressibility of isospin asymmetric nuclear matter.

Citations

• Spinodal decomposition of low-density asymmetric nuclear matter
• Nuclear masses and deformations
• Isospin Fractionation in Nuclear Multifragmentation
• The Physics of Neutron Stars

Cited by

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• Symmetry Energy of Dilute Warm Nuclear Matter
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• Common Approaches in Description of Ordinary Liquids
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• Systematic study of theπ−/π+ratio in heavy-ion collisions with the same neutron/proton ratio but different masses
• Nuclear symmetry energy effects on liquid-gas phase transition in hot asymmetric nuclear matter
• Neutron star observations: Prognosis for equation of state constraints