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.

arXiv comment4 pages, 4 figures Accepted to PRL

References in corpus (16)

• Isotopic Scaling in Nuclear Reactions
• Caloric curves and critical behavior in nuclei
• Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transition
• The liquid to vapor phase transition in excited nuclei
• Multifragmentation of a very heavy nuclear system (II): bulk properties and spinodal decomposition
• Reaction Dynamics and Multifragmentation in Fermi Energy Heavy Ion Reactions
• Microscopic model approaches to fragmentation of nuclei and phase transitions in nuclear matter
• Fragment Charge Correlations and Spinodal Decomposition in Finite Nuclear Systems
• Evidence for the Jacobi shape transition in hot 46Ti
• First order phase transitions: equivalence between bimodalities and the Yang-Lee theorem
• The influence of Coulomb on the liquid-gas phase transition and nuclear multifragmentation
• Correlations between signals of the liquid-gas phase transition in nuclei
• Equilibrium under flow
• Towards the critical behavior for the light nuclei by NIMROD detector
• Phase Transition in Small System
• Hot fragmentation of nuclei

Cited by in corpus (18)

• Microcanonical Analyses of Peptide Aggregation Processes
• Liquid-Gas phase transition in nuclei
• Bimodal behavior of the heaviest fragment distribution in projectile fragmentation
• Nuclear liquid-gas phase transition with machine learning
• Bimodality: a possible experimental signature of the liquid-gas phase transition of nuclear matter
• Thermodynamics of Peptide Aggregation Processes. An Analysis from Perspectives of Three Statistical Ensembles
• Intermediate-mass fragments from fission and multifragmentation in the spallation of 136Xe
• Finite-size scaling phenomenon of nuclear liquid--gas phase transition probes
• Signals of bimodality in the fragmentation of Au quasi-projectiles
• Bimodality and Coulomb effects with a canonical thermodynamic model
• Bimodalities : a survey of experimental data and models
• Effect of initial-state geometric configurations on the nuclear liquid-gas phase transition
• Sensitivity study of experimental measures for the nuclear liquid-gas phase transition in the statistical multifragmentation model
• Nuclear Chemical and Mechanical Instability and the Liquid-Gas Phase Transition in Nuclei
• Is bimodality a sufficient condition for a first order phase transition existence?
• Microscopic statistical basis of classical Thermodynamics of finite systems
• Investigation of the nuclear liquid-gas phase transition in the static AMD
• Density functional approach to finite temperature nuclear properties and the role of a momentum dependent isovector interaction