Effects of momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei

2003/12/31 by Bao-An Li, Champak B. Das, Subal Das Gupta +1 · 2 citations
Physics and Astronomy · #nucl-th #nucl-ex

paper · pdf · doi:10.1016/j.nuclphysa.2004.02.016

published as Nucl.Phys.A735:563-584,2004 · The version to appear in Nucl. Phys. A. A paragraph and a figure on neutron and proton effective masses in neutron-rich matter are added

arxiv created 2004/02/20 · arxiv updated 2009/12/01

Abstract

Using an isospin- and momentum-dependent transport model we study effects of the momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei. It is found that symmetry potentials with and without the momentum-dependence but corresponding to the same density-dependent symmetry energy E_sym(ρ) lead to significantly different predictions on several E_sym(ρ)-sensitive experimental observables especially for energetic nucleons. The momentum- and density-dependence of the symmetry potential have to be determined simultaneously in order to extract the E_sym(ρ) accurately. The isospin asymmetry of midrapidity nucleons at high transverse momenta is particularly sensitive to the momentum-dependence of the symmetry potential. It is thus very useful for investigating accurately the equation of state of dense neutron-rich matter.

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