Transition from participant to spectator fragmentation in Au+Au reactions between 60A and 150A MeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2007

Transition from participant to spectator fragmentation in Au+Au reactions between 60A and 150A MeV

A. Le Fevre
  • Function : Author
Joerg Aichelin
J. Lukasik
  • Function : Author
W. Reisdorf
  • Function : Author
U. Lynen
  • Function : Author
W.F.J. Müller
  • Function : Author
H. Orth
  • Function : Author
C. Schwarz
  • Function : Author
C. Sfienti
  • Function : Author
W. Trautmann
  • Function : Author
K. Turzó
  • Function : Author
G. Auger
  • Function : Author
  • PersonId : 1370146
  • IdRef : 138026408
R. Dayras
  • Function : Author
N. Le Neindre
O. Lopez
L. Nalpas
  • Function : Author
M. Pârlog
E. Plagnol
  • Function : Author
M. F. Rivet
  • Function : Author
E. Rosato
  • Function : Author
E. Vient
M. Vigilante
  • Function : Author

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.

Dates and versions

in2p3-00084674 , version 1 (10-07-2006)

Identifiers

Cite

K. Zbiri, A. Le Fevre, Joerg Aichelin, J. Lukasik, W. Reisdorf, et al.. Transition from participant to spectator fragmentation in Au+Au reactions between 60A and 150A MeV. Physical Review C, 2007, 75, pp.034612. ⟨10.1103/PhysRevC.75.034612⟩. ⟨in2p3-00084674⟩
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