Transition from participant to spectator fragmentation in Au+Au reactions between 60A and 150A MeV
K. Zbiri
(1)
,
A. Le Fevre
,
Joerg Aichelin
(1)
,
J. Lukasik
,
W. Reisdorf
,
F. Gulminelli
(2)
,
U. Lynen
,
W.F.J. Müller
,
H. Orth
,
C. Schwarz
,
C. Sfienti
,
W. Trautmann
,
K. Turzó
,
B. Zwieglinski
(3)
,
G. Auger
(4)
,
J.L. Charvet
(5)
,
A. Chbihi
(3)
,
R. Dayras
,
D. Dominique Durand
(2)
,
J.D. Frankland
(3)
,
R. Legrain
(5)
,
N. Le Neindre
,
O. Lopez
(2)
,
L. Nalpas
,
M. Pârlog
(3)
,
E. Plagnol
(4)
,
M. F. Rivet
,
E. Rosato
,
E. Vient
(2)
,
M. Vigilante
,
C. Volant
(5)
,
J.P. Wieleczko
(3)
A. Le Fevre
- Function : Author
Joerg Aichelin
- Function : Author
- PersonId : 1055075
- ORCID : 0000-0001-9523-814X
- IdRef : 068771703
J. Lukasik
- Function : Author
W. Reisdorf
- Function : Author
F. Gulminelli
- Function : Author
- PersonId : 940738
- ORCID : 0000-0003-4354-2849
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
R. Dayras
- Function : Author
D. Dominique Durand
- Function : Author
- PersonId : 12933
- IdHAL : dominique-durand
- IdRef : 07852279X
J.D. Frankland
- Function : Author
- PersonId : 737417
- IdHAL : john-frankland
- ORCID : 0000-0002-4907-5041
N. Le Neindre
- Function : Author
- PersonId : 749506
- IdHAL : nicolas-le-neindre
- ORCID : 0000-0001-5419-6764
O. Lopez
- Function : Author
- PersonId : 737418
- IdHAL : olivier-lopez1966
- ORCID : 0000-0003-0818-4564
- IdRef : 233548580
L. Nalpas
- Function : Author
M. Pârlog
- Function : Author
- PersonId : 828878
- ORCID : 0000-0002-7566-0244
M. F. Rivet
- Function : Author
E. Rosato
- Function : Author
E. Vient
- Function : Author
- PersonId : 940571
- ORCID : 0000-0002-6891-7750
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.