Experimental and Theoretical Search for a Phase Transition in Nuclear Fragmentation

Details Experimental and Theoretical Search for a Phase Transition in Nuclear Fragmentation Experimental and Theoretical Search for a Phase Transition in Nuclear Fragmentation

1999-01-08

arxiv.org/abs/nucl-th/9901016v2

Eur.Phys.J. A5 (1999) 251-255

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

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.

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