Isospin Equilibration in Relativistic Heavy-ion Collisions * †
نویسنده
چکیده
We study the kinetic and chemical 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 abundancy increases both with energy and mass. Experimentally, the projectile/target equilibration 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 , 44 96 Ru + 40 96 Zr, we investigate the influence of the equation of state and the inelastic in-medium cross section.
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