Investigation of Low-Density Symmetry Energy via Nucleon and Fragment Observables

Details Investigation of Low-Density Symmetry Energy via Nucleon and Fragment Observables Investigation of Low-Density Symmetry Energy via Nucleon and Fragment Observables

2007-12-13

arxiv.org/abs/0712.2187v1

Physics

Nuclear Physics

Nuclear Theory

6 pages, 6 figures; Contrib. to Int. Symp. on Exotic States of Nuclear Matter (EXOCT2007), Catania, Italy, June 2007, World Sc

Scientific paper

With stochastic transport simulations we study in detail central and peripheral collisions at Fermi energies and suggest new observables, sensitive to the symmetry energy below normal density. As such we identify on one hand the isospin imbalance ratio, i.e. the relative amount of isospin equilibration in binary, peripheral reactions of nuclei with different isospin, as a function of the energy loss, which is sensitive to isospin diffusion; on the other hand the isospin asymmetry of an intermediate mass fragment (IMF) in symmetric collisions in ternary reactions, or more particularly, the ratio of the IMF to the residue asymmetry, which is sensitive to isospin migration.

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