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Heavy-ion peripheral collisions in the Fermi energy domain : Fragmentation processes or dissipative collisions ?

1990; EDP Sciences; Volume: 15; Issue: 4 Linguagem: Inglês

10.1051/anphys

1286-4838

B. Borderie, M. F. Rivet, L. Tassan–Got,

Quantum Chromodynamics and Particle Interactions

For several years a new field in nuclear physics has been opened by the opportunity to accelerate heavy ions through an energy domain including the Fermi energy of nucleons. The new domain has to be seen as a link between dissipative processes observed at low energies, dominated by mean field considerations, and high energy collisions for which nucleon-nucleon collisions play an important role. This paper reviews our present knowledge on peripheral collisions. A reminder of contiguous energy domains is done as well as their extension in the new field. Specific calculations are also presented. Finally a wide comparison between experiments and calculations is performed. A fast dissipative stage proves to be responsible for the dominant mechanisms involved, at least when the incident energy is lower than 50 MeV/nucleon.