Entropy evolution in heavy ion collision

K. K. Gudima, V. D. Toneev, G. Röpke, and H. Schulz
Phys. Rev. C 32, 1605 – Published 1 November 1985
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Abstract

The entropy evolution in heavy ion collisions is investigated by means of a cascade model study. The method for calculating the entropy is based on a smoothing over the momentum space by introducing a local temperature field. It is shown that the resulting specific entropy is rather sensitive to the proper choice of the phase space subdivision at the disassembly stage of the collision. Compared to recent results for specific entropy values inferred from the composite particle yield of measurements, it is found that the cascade calculations do not favor other model treatments, but as a trend we obtain smaller entropy values than following from conventional considerations within equilibrium statistics.

  • Received 29 April 1985

DOI:https://doi.org/10.1103/PhysRevC.32.1605

©1985 American Physical Society

Authors & Affiliations

K. K. Gudima and V. D. Toneev

  • Joint Institute for Nuclear Research, Dubna, Union of Soviet Socialist Republics

G. Röpke

  • Wilhelm Pieck University, Rostock, German Democratic Republic

H. Schulz

  • The Niels Bohr Institute, 2100 Copenhagen, Denmark and Central Institute for Nuclear Research, Rossendorf, 8051 Dresden, German Democratic Republic

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Issue

Vol. 32, Iss. 5 — November 1985

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