Transition from participant to spectator fragmentation in Au+Au reaction   between 60 AMeV and 150 AMeV
  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. 
K. Zbiri, A. LeF\`evre, J. Aichelin, J. {\L}ukasik, W. Reisdorf, F.   Gulminelli, U. Lynen, W.F.J. M\"uller, H. Orth, C. Sch...