Acta Physica Polonica B
Vol. 29, No. 1--2, January--February 1998, page 259
Dynamical and Statistical Aspects in Nucleus--Nucleus Collisions Around the Fermi Energy
B. Tamain, M. Assenard, G. Auger, C.O. Bacri, J. Benlliure, E. Bisquer, F. Bocage, B. Borderie, R. Bougault, P. Buchet, J.L. Charvet, A. Chbihi, J. Colin, D. Cussol, R. Dayras, A. Demeyer, D. Dore, D. Durand, P. Eudes, J. Frankland, E. Galichet, E. Genouin-Duhamel, E. Gerlic, M. Germain, D. Gourio, D. Guinet, F. Gulminelli, P. Lautesse, J.L. Laville, C. Lebrun, J.F. Lecolley, A. Lefevre, T. Lefort, R. Legrain, N. Le Neindre, O. Lopez, M. Louvel, J. Lukasik, N. Marie, M. Maskay, V. Metivier, L. Nalpas, A. Nguyen, M. Parlog, J. Peter, E. Plagnol, A. Rahmani, T. Reposeur, M. F Rivet, E. Rosato, F. Saint-Laurent, S. Salou, M. Squalli, J.C. Steckmeyer, M. Stern, T. Tabacaru, L. Tassan-got, O. Tirel, E. Vient, C. Volan, J.P. Wieleczko
This contribution is devoted to two important aspects of intermediate
energy nucleus-nucleus collisions: the competition of dynamical and statistical
features, and the origin of the multifragmentation process. These two questions
are discussed in focusing on Indra data. It turns out that most of collisions
are binary and reminiscent of deep inelastic collisions observed at low
energy. However, intermediate velocity emission is a clear signature of
dynamical emission and establishes a link with the participant-spectator
picture which applies at high bombarding energies. Multifragmentation is
observed when the dissipated energy is large and it turns out that expansion
occurs at least for central collisions, as it is expected if this phenomenum
has a dynamical origin.
PACS numbers: 25.70.Mn, 25.70.--z