Collective flow in heavy ion reactions and the properties of excited nuclear matter

  • Quantum Molecular Dynamics (QMD) calculations of central collisions between heavy nuclei are used to study fragment production and the creation of collective flow. It is shown that the final phase space distributions are compatible with the expectations from a thermally equilibrated source, which in addition exhibits a collective transverse expansion. However, the microscopic analyses of the transient states in the intermediate reaction stages show that the event shapes are more complex and that equilibrium is reached only in very special cases but not in event samples which cover a wide range of impact parameters as it is the case in experiments. The basic features of a new molecular dynamics model (UQMD) for heavy ion collisions from the Fermi energy regime up to the highest presently available energies are outlined.

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Author:Jens Konopka, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Mathias Brandstetter, Christoph Ernst, Lars GerlandGND, Walter GreinerGND, Sven SoffORCiD, Christian Spieles, Horst StöckerORCiDGND, Henning WeberGND, Luke Andreas WinckelmannGND
ArXiv Id: v1
Document Type:Preprint
Year of Completion:1996
Year of first Publication:1996
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/14
Page Number:12
Source: , Invited talk given by H. Stoecker, to appear in the proceedings of the 1st Catania Relativistic Ion Studies (CRIS '96), Catania (Italy), May 27-31 1996
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht