Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-12-16
Phys.Rev. C73 (2006) 024613
Physics
Nuclear Physics
Nuclear Theory
20 pages, 7 figures
Scientific paper
10.1103/PhysRevC.73.024613
The sensitivity of the Statistical Multifragmentation Model to the underlying statistical assumptions is investigated. We concentrate on its micro-canonical, canonical, and isobaric formulations. As far as average values are concerned, our results reveal that all the ensembles make very similar predictions, as long as the relevant macroscopic variables (such as temperature, excitation energy and breakup volume) are the same in all statistical ensembles. It also turns out that the multiplicity dependence of the breakup volume in the micro-canonical version of the model mimics a system at (approximately) constant pressure, at least in the plateau region of the caloric curve. However, in contrast to average values, our results suggest that the distributions of physical observables are quite sensitive to the statistical assumptions. This finding may help deciding which hypothesis corresponds to the best picture for the freeze-out stage
Aguiar Carlos Eduardo
Donangelo Raul
Souza Sergio R.
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