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

  • 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.

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Author:Barbara V. Jacak, Horst StöckerORCiDGND, Gary D. WestfallGND
Parent Title (German):Physical review C
Document Type:Article
Date of Publication (online):2006/06/13
Year of first Publication:1984
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/06/13
Page Number:4
First Page:1744
Last Page:1747
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht