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20 April 2024

» arxiv » nucl-th/0607012

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Transition from participant to spectator fragmentation in Au+Au reaction between 60 AMeV and 150 AMeV
K. Zbiri ; A. LeFèvre ; J. Aichelin ; J. Lukasik ; W. Reisdorf ; F. Gulminelli ; U. Lynen ; W.F.J. Müller ; H. Orth ; C. Schwarz ; C. Sfienti ; W. Trautmann ; K. Turzó ; B. Zwiegli’nski ; G. Auger ; J.L. Charvet ; A. Chbihi ; R. Dayras ; D. Durand ; J. D. Frankland ; R. Legrain ; N. Le Neindre ; O. Lopez ; L. Nalpas ; M. Parlog ; M. F. Rivet ; E. Rosato ; E. Vient ; M. Vigilante ; C. Volant ; J.P. Wieleczko ; PostScript ; PDF ; Other formats ; SLAC-SPIRES HEP ; to ; by ;
Date:	7 Jul 2006
Abstract:	Using the quantum molecular dynamics approach, we analyze the results of the recent INDRA Au+Au experiments at GSI in the energy range between 60 AMeV and 150 AMeV. It turns out that in this energy region the transition toward a participant-spectator scenario takes place. The large Au+Au system displays in the simulations as in the experiment simultaneously dynamical and statistical behavior which we analyze in detail: The composition of fragments close to midrapidity follows statistical laws and the system shows bi-modality, i.e. a sudden transition between different fragmentation pattern as a function of the centrality as expected for a phase transition. The fragment spectra at small and large rapidities, on the other hand, are determined by dynamics and the system as a whole does not come to equilibrium, an observation which is confirmed by FOPI experiments for the same system.
Source:	arXiv, nucl-th/0607012
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