Fragment Formation and Phase Transitions in Heavy Ion Collisions

2000/03/20 by T. Gaitanos, H. H. Wolter, Gaitanos, T. +5
Physics and Astronomy · #High-Energy Particle Collisions Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.48550/arxiv.nucl-th/0003043

10 pages, 7 postscript-figures, proceedings of the XXXVIII International Winter Meeting on Nuclear Physics, Bormio, Italy, January 24-29, 2000

arxiv created 2000/03/20 · arxiv updated 2009/12/01

Abstract

We investigate the thermodynamical properties of nuclear matter in heavy ion collisions, in particular with respect to questions of thermodynamical instability, phase transitions and fragmentation. For this we analyze results of relativistic transport calculations of Au+Au collisons at intermediate energies, separately for spectator and participant matter. On one hand, we determine local thermodynamical variables from the analysis of the local momentum distribution; on the other, we analyze fragment energy spectra in a blast model scenario. We find that the spectator represents an instable, equilibrized fragmenting source, while in the participant no such common source can be identified. Our results compare well with experimental determinations of temperatures and flow velocities.

Related

• Thermodynamical characterization of heavy ion reactions
• Collective flow in heavy ion reactions and the properties of excited nuclear matter
• Stability of fragments and study of participant-spectator matter at peak center-of-mass energy
• Fragment production in central heavy-ion collisions: reconciling the dominance of dynamics with observed phase transition signals through universal fluctuations
• Phase-space analysis of fragments formed in heavy-ion collisions