Entropy of a system formed in the collision of heavy ions

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6396388

Gudima, K K; Roepke, G; Toneev, V D; Schulz, H

In the framework of the cascade model, we study the evolution of the entropy of a system formed in the collision of heavy ions. The method of calculating the entropy is based on a smoothing of the momentum distribution function by means of introducing a temperature field. It is shown that the resulting entropy per nucleon is very sensitive to the specific partitioning of phase space into cells in the free-expansion phase of the reaction. From comparison with experiment it is found that the cascade calculations do not show a preference for a particular model calculation of the entropy, but predict that the entropy is smaller than the values following from equilibrium statistics.

• Research Organization: Joint Institute for Nuclear Research
• OSTI ID: 6396388
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 45:1; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
ENTROPY
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
NUCLEAR CASCADES
NUCLEAR MODELS
NUCLEAR REACTIONS
PHASE SPACE
PHYSICAL PROPERTIES
SPACE
THERMODYNAMIC PROPERTIES