Looking for bimodal distributions in multi-fragmentation reactions

Abstract

The presence of a phase transition in a finite system can be deduced, together with its order, from the shape of the distribution of the order parameter. This issue has been extensively studied in multifragmentation experiments, with results that do not appear fully consistent. In this paper we discuss the effect of the statistical ensemble or sorting conditions on the shape of fragment distributions, and propose a new method, which can be easily implemented experimentally, to discriminate between different fragmentation scenarii. This method, based on a reweighting of the measured distribution to account for the experimental constraints linked to the energy deposit, is tested on different simple models, and appears to provide a powerful discrimination.

11 pages, 7 figures

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Cited by in corpus (13)

• Nuclear multifragmentation and phase transition for hot nuclei
• Liquid-Gas phase transition in nuclei
• Bimodal behavior of the heaviest fragment distribution in projectile fragmentation
• Intermediate-mass fragments from fission and multifragmentation in the spallation of 136Xe
• Signals of bimodality in the fragmentation of Au quasi-projectiles
• Bimodality and Coulomb effects with a canonical thermodynamic model
• Dynamical and statistical bimodality in nuclear fragmentation
• Thermodynamics of clusterized matter
• Equilibrium fluctuation theorems compatible with anomalous response
• Is bimodality a sufficient condition for a first order phase transition existence?
• Transformation between statistical ensembles in the modelling of nuclear fragmentation
• The prominent role of the heaviest fragment in multifragmentation and phase transition for hot nuclei
• A hybrid model for multi-particle production and multi-fragment emission in electron-nucleus collisions at the forthcoming Electron-Ion Collider