Bimodality as a signal of Liquid-Gas phase transition in nuclei?

Details Bimodality as a signal of Liquid-Gas phase transition in nuclei? Bimodality as a signal of Liquid-Gas phase transition in nuclei?

2005-04-08

arxiv.org/abs/nucl-th/0504027v2

Phys.Rev.Lett. 95 (2005) 242701

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures Accepted to PRL

Scientific paper

10.1103/PhysRevLett.95.242701

We use the HIPSE (Heavy-Ion Phase-Space Exploration) Model to discuss the origin of the bimodality in charge asymmetry observed in nuclear reactions around the Fermi energy. We show that it may be related to the important angular momentum (spin) transferred into the quasi-projectile before secondary decay. As the spin overcomes the critical value, a sudden opening of decay channels is induced and leads to a bimodal distribution for the charge asymmetry. In the model, it is not assigned to a liquid-gas phase transition but to specific instabilities in nuclei with high spin. Therefore, we propose to use these reactions to study instabilities in rotating nuclear droplets.

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