Study of the fusion-fission process in the 35Cl + 24Mg reaction
C. Beck1 - R. Nouicer1 - D. Mahboub1 - B. Djerroud1 - R.M. Freeman1 - A. Hachem1 - T. Matsuse1 - Sl. Cavallaro2 - E. De Filippo2 - G. Lanzanó2 - A. Pagano2 - M.L. Sperduto2 - R. Dayras3 - E. Berthoumieux3 - R. Legrain3 - E. Pollacco3
1 Institut de Recherches Subatomiques, Institut National de Physique Nucléaire et de
Physique des Particules - Centre National de la Recherche Scientifique/Université Louis
Pasteur, B.P.28, F-67037 Strasbourg Cedex 2, France
2 Dipartimento di Fisica dell'Universitá di Catania, INFN and LNS Catania, I-95129 Catania, Italy
3 DAPNIA/SPhN, C.E. Saclay, F-91191 Gif sur Yvette Cedex, France
Received: 12 March 1998 Communicated by D. Schwalm
Abstract
Fusion-fission and fully energy-damped binary processes of the
35Cl+24Mg reaction were investigated using particle-particle
coincidence techniques at a 35Cl bombarding energy of Elab 
8 MeV/nucleon. Inclusive data were also taken in order to determine the partial
wave distribution of the fusion process. The fragment-fragment correlation data
show that the majority of events arises from a binary-decay process with a
relatively large multiplicity of secondary light-charged particles emitted by
the two primary excited fragments in the exit channel. No evidence is observed
for ternary-breakup processes, as expected from the systematics recently
established for incident energies below 15 MeV/nucleon and for a large number
of reactions. The binary-process results are compared with predictions of
statistical-model calculations. The calculations were performed using the
Hauser-Feshbach method, based on the available phase space at the
scission point of the compound nucleus. This new method uses
temperature-dependent level densities and its predictions are in good agreement
with the presented experimental data, thus consistent with the fusion-fission
origin of the binary fully-damped yields.
PACS
24.60.Dr Statistical compound-nucleus reactions -
25.70.Gh Compound nucleus -
25.70.Jj Fusion and fusion-fission reaction -
25.70.-z Low and intermediate energy heavy-ion reactions
Copyright Springer-Verlag
