Bimodal pattern in the fragmentation of Au quasi-projectiles

Details Bimodal pattern in the fragmentation of Au quasi-projectiles Bimodal pattern in the fragmentation of Au quasi-projectiles

2006-12-29

arxiv.org/abs/nucl-ex/0612030v1

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 11 figures, submitted to European Physical Journal A

Scientific paper

Signals of bimodality have been investigated in experimental data of quasi-projectile decay produced in Au+Au collisions at 35 AMeV. This same data set was already shown to present several signals characteristic of a first order, liquid-gas-like phase transition. For the present analysis, events are sorted in bins of transverse energy of light charged particles emitted by the quasi-target source. A sudden change in the fragmentation pattern is observed from the distributions of the asymmetry of the two largest fragments, and the charge of the largest fragment. This latter distribution shows a bimodal behavior. The interpretation of this signal is discussed.

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