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

Abstract : 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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https://hal.archives-ouvertes.fr/hal-00004650
Contributeur : Olivier Lopez <>
Soumis le : jeudi 29 septembre 2005 - 19:00:10
Dernière modification le : mardi 19 février 2019 - 11:16:01
Document(s) archivé(s) le : lundi 20 septembre 2010 - 11:36:40

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O. Lopez, D. Lacroix, E. Vient. Bimodality as a signal of Liquid-Gas phase transition in nuclei?. Physical Review Letters, American Physical Society, 2005, 95, pp.242701. ⟨10.1103/PhysRevLett.95.242701⟩. ⟨hal-00004650v2⟩

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