Isospin equilibration in relativistic heavy-ion collisions

Details Isospin equilibration in relativistic heavy-ion collisions Isospin equilibration in relativistic heavy-ion collisions

1998-09-18

arxiv.org/abs/nucl-th/9809058v2

Eur.Phys.J. A5 (1999) 77-84

Physics

Nuclear Physics

Nuclear Theory

16 pages, 12 figures, submitted to Europ. Phys. J. A Discussion added

Scientific paper

10.1007/s100500050259

We study the mixing and the kinetic equilibration of projectile and target nucleons in relativistic heavy-ion collisions in the energy regime between 150~AMeV and 2~AGeV in a coupled-channel BUU (CBUU) approach. We find that equilibrium in the projectile-target degrees of freedom is in general not reached even for large systems at low energy where elastic nucleon-nucleon collisions dominate. Inelastic nucleon excitations are more favorable for equilibration and their relative abundance increases both with energy and mass. Experimentally, the projectile/target admixture can be determined by measuring the degree of isospin equilibration in isospin asymmetric nuclear collisions. For one of the most promising systems currently under investigation, ${}^{96}_{44}{\rm Ru}+{}^{96}_{40}{\rm Zr}$, we investigate the influence of the equation of state and the inelastic in-medium cross section.

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