Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
1999-07-30
Nucl.Phys. A662 (2000) 397-422
Physics
Nuclear Physics
Nuclear Experiment
37 pages, 13 figures
Scientific paper
10.1016/S0375-9474(99)00402-9
Intermediate velocity products in Ar+Ni collisions from 52 to 95 A.MeV are studied in an experiment performed at the GANIL facility with the 4$\pi$ multidetector INDRA. It is shown that these emissions cannot be explained by statistical decays of the quasi-projectile and the quasi-target in complete equilibrium. Three methods are used to isolate and characterize intermediate velocity products. The total mass of these products increases with the violence of the collision and reaches a large fraction of the system mass in mid-central collisions. This mass is found independent of the incident energy, but strongly dependent on the geometry of the collision. Finally it is shown that the kinematical characteristics of intermediate velocity products are weakly dependent on the experimental impact parameter, but strongly dependent on the incident energy. The observed trends are consistent with a participant-spectator like scenario or with neck emissions and/or break-up.
Cussol Daniel
Dore Diane
Lefort T.
Ma Yong-Ge
Peter Jörn
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