TY - JOUR A1 - Jacak, Barbara V. A1 - Stöcker, Horst A1 - Westfall, Gary D. T1 - Rapidity dependence of entropy production in proton- and nucleus-induced reactions on heavy nuclei T2 - Physical review C N2 - The entropy of hot nuclear systems is deduced from the mass distribution of fragments emitted from high energy proton- and nucleus-induced reactions via a quantum statistical model. It is found that the entropy per baryon, S/A, of intermediate rapidity ("participant") fragments is higher than the entropy of target rapidity ("spectator") fragments. The spectator fragments exhibit S/A values of ≅ 1.8 independent of the projectile energy from 30 MeV/nucleon up to 350 GeV. This value of the entropy coincides with the entropy at which nuclear matter becomes unbound. Y1 - 2006 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2618 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-27764 UR - http://link.aps.org/abstract/PRC/v29/p1744 VL - 29 IS - 5 SP - 1744 EP - 1747 ER -