Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-07-07
Phys.Rev.C75:034612,2007
Physics
Nuclear Physics
Nuclear Theory
published version
Scientific paper
10.1103/PhysRevC.75.034612
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.
Aichelin Joerg
Auger Gerard
Charvet J.-L.
Chbihi Abdelahad
Dayras R.
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