Multiplicity and Bombarding Energy Dependence of the Entropy in Relativistic Heavy-Ion Reactions.

摘要

The yield ratios of light clusters (d,t,/sup 3/He, alpha ) to protons were measured with the Plastic Ball spectrometer for the reactions Nb+Nb and Au+Au for incident beam energies of 150, 250, 400 and 650 MeV/nucleon. The ratios are analyzed in the framework of the Quantum Statistical Model and the specific entropy is extracted as a function of the participant proton multiplicity. The results are compared with predictions of the fireball model and relativistic mean field calculations. (ERA citation 13:013253)