Rapidity dependence of entropy production in proton- and nucleus-induced reactions on heavy nuclei

Journal Article · Tue May 01 00:00:00 EDT 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1744· OSTI ID:6746161

Jacak, B V; Stoecker, H; Westfall, G D

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 roughly-equal1.8 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.

• Research Organization: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
• OSTI ID: 6746161
• Journal Information: Phys. Rev. C; (United States), Vol. 29:5
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HEAVY ION REACTIONS
ENTROPY
FRAGMENTATION
HEAVY NUCLEI
PROTON REACTIONS
CROSS SECTIONS
MASS SPECTRA
MEV RANGE 100-1000
NUCLEAR MATTER
PARTICLE RAPIDITY
SPALLATION
STATISTICAL MODELS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
HADRON REACTIONS
MATHEMATICAL MODELS
MATTER
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPECTRA
THERMODYNAMIC PROPERTIES
653003* - Nuclear Theory- Nuclear Reactions & Scattering