Determination of the Stiffness of the Nuclear Symmetry Energy from Isospin Diffusion
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- 26 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (3), 032701
- https://doi.org/10.1103/physrevlett.94.032701
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 at subnormal densities. This leads to a significantly constrained value of about for the isospin-dependent part of the isobaric incompressibility of isospin asymmetric nuclear matter.
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