AMD Study of the EOS of Asymmetric Nuclear Matter in Nuclear Collisions

概要

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AMD reaction calculations have been performed with two effective forces with different isospin property in high density and in low density. We have found several possibilities of observing the isospin effects in nuclear collisions with high isospin asymmetry. In many cases, we find that the isospin asymmetry of the high density part at the compression stage strongly reflects the symmetry energy at high density. This effect in the early dynamical stage may be observed in the final state of the reaction by carefully studying the proton flow and neutron flow, like the energy difference between t and ^3He. The isospin property of the EOS in low density is responsible for the isotope yield or N/Z of each element in appropriate reaction systems, which can be understood by the idea of the distillation or the fractionation. The even-odd staggering in the fragment charge distribution is also affected by the isospin property of the effective force in low density.
理論物理学刊行会の論文
2002-12-26