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Experimental and Theoretical Search for a Phase Transition in Nuclear Fragmentation | | A. Chbihi
; O. Schapiro
; S. Salou
; D.H.E. Gross
; | | Date: |
8 Dec 1998 | | Journal: | Eur.Phys.J. A5 (1999) 251-255 | | Subject: | Nuclear Theory; Statistical Mechanics | nucl-th cond-mat.stat-mech nucl-ex | | Affiliation: | GANIL, Caen, France Hahn-Meitner-Institut, Berlin, Germany | | Abstract: | Phase transitions of small isolated systems are signaled by the shape of the caloric equation of state e^*(T), the relationship between the excitation energy per nucleon e^* and temperature. In this work we compare the experimentally deduced e^*(T) to the theoretical predictions. The experimentally accessible temperature was extracted from evaporation spectra from incomplete fusion reactions leading to residue nuclei. The experimental e^*(T) dependence exhibits the characteristic S-shape at e^* = 2-3 MeV/A. Such behavior is expected for a finite system at a phase transition. The observed dependence agrees with predictions of the MMMC-model, which simulates the total accessible phase-space of fragmentation. | | Source: | arXiv, nucl-th/9901016 | | Services: | Forum | Review | PDF | Favorites | |
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