The dynamics of fragment formation
- Kent State Univ., OH (United States)
We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late stage of the collision to determine composites, provides an equivalent description only under limited conditions of centrality and beam energy. We use data on participant fragment production in Au + Au collisions in the Bevalac`s BOS time projection chamber to map out the parameter space where statistical clustering provides a good description. In particular, we investigate momentum-space densities of fragments up to {sup 4}He as a function of fragment transverse momentum, azimuth relative to the reaction plane, rapidity, multiplicity and beam energy.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098; FG02-89ER40531; FG02-88ER40408; FG02-88ER40412; FG05-88ER40437
- OSTI ID:
- 81818
- Report Number(s):
- LBL-36370; CONF-9409242-3; ON: DE95011279; CNN: Grant PHY-9123301; TRN: 95:016227
- Resource Relation:
- Conference: CORINNE 2: international conference on multiparticles correlation and particle production in nucleus-nucleus collisions, Nantes (France), 5-9 Sep 1994; Other Information: PBD: Sep 1994
- Country of Publication:
- United States
- Language:
- English
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