Bimodal behavior of the heaviest fragment distribution in projectile fragmentation

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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Submitted on : Thursday, July 9, 2009 - 12:10:13 PM
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E. Bonnet, D. Mercier, Bernard Borderie, F. Gulminelli, Marie-France Rivet, et al.. Bimodal behavior of the heaviest fragment distribution in projectile fragmentation. Physical Review Letters, American Physical Society, 2009, 103, pp.072701. ⟨10.1103/PhysRevLett.103.072701⟩. ⟨hal-00345772v3⟩

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