Bimodal behavior of the heaviest fragment distribution in projectile fragmentation

Eric Bonnet; Damien Mercier; Bernard Borderie; Francesca Gulminelli; Marie-France Rivet; Bernard Tamain; R. Bougault; A. Chbihi; R. Dayras; J. D. Frankland; E. Galichet; F. Gagnon-Moisan; D. Guinet; P. Lautesse; J. Lukasik; N. Le Neindre; M. Pârlog; E. Rosato; R. Roy; M. Vigilante; J. P. Wieleczko; B. Zwieglinski

doi:10.1103/physrevlett.103.072701

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arXiv · 0812.1871

Bimodal behavior of the heaviest fragment distribution in projectile fragmentation

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Abstract

The charge distribution of the heaviest fragment detected in the decay of quasi-projectiles produced in intermediate energy heavy-ion collisions has been observed to be bimodal. This feature is expected as a generic signal of phase transition in non-extensive systems. In this paper we present new analyses of experimental data from Au on Au collisions at 60, 80 and 100 MeV/nucleon showing that bimodality is largely independent of the data selection procedure, and of entrance channel effects. An estimate of the latent heat of the transition is extracted.

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Eric Bonnet, Damien Mercier, Bernard Borderie, Francesca Gulminelli, Marie-France Rivet, Bernard Tamain, R. Bougault, A. Chbihi, R. Dayras, J. D. Frankland, E. Galichet, F. Gagnon-Moisan, D. Guinet, P. Lautesse, J. Lukasik, N. Le Neindre, M. Pârlog, E. Rosato, R. Roy, M. Vigilante, J. P. Wieleczko, B. Zwieglinski. 2009-07-09. Bimodal behavior of the heaviest fragment distribution in projectile fragmentation. https://doi.org/10.1103/physrevlett.103.072701

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