Break-up fragment topology in statistical multifragmentation models

Abstract : Break-up fragmentation patterns together with kinetic and configurational energy fluctuations are investigated in the framework of a microcanonical model with fragment degrees of freedom over a broad excitation energy range. As long as fragment partitioning is approximately preserved, energy fluctuations are found to be rather insensitive to both the way in which the freeze-out volume is constrained and the trajectory followed by the system in the excitation-energy–freeze-out volume space. Due to hard-core repulsion, the freeze-out volume is found to be populated nonuniformly, its highly depleted core giving the source a bubble-like structure. The most probable localization of the largest fragments in the freeze-out volume may be inferred experimentally from their kinematic properties, largely dictated by Coulomb repulsion.
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Journal articles
Physical Review C, American Physical Society, 2009, 80, 014602 [7 p.]. <10.1103/PhysRevC.80.014602>


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Submitted on : Thursday, August 27, 2009 - 2:00:33 PM
Last modification on : Thursday, August 27, 2009 - 5:00:51 PM

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Ad. R. Raduta. Break-up fragment topology in statistical multifragmentation models. Physical Review C, American Physical Society, 2009, 80, 014602 [7 p.]. <10.1103/PhysRevC.80.014602>. <in2p3-00411429>

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