The European Physical Journal A

ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)

Table of Contents

Abstract Volume 2 Issue 3 (1998) pp 281-293

heavy ion physics: Study of the fusion-fission process in the ³⁵Cl + ²⁴Mg reaction

C. Beck (1), R. Nouicer (1), D. Mahboub (1), B. Djerroud (1) (a), R.M. Freeman (1), A. Hachem (1) (b), T. Matsuse (1) (c), Sl. Cavallaro (2), E. De Filippo (2), G. Lanzanó (2), A. Pagano (2), M.L. Sperduto (2), R. Dayras (3), E. Berthoumieux (3), R. Legrain (3), E. Pollacco (3)

(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

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 E_lab \approx 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

(a) Present Address: Department of Chemistry, University of Rochester, Rochester NY 14627, USA
(b) Permanent Address: Département de Physique, Université de Nice Sophia-Antipolis, F-06034 Nice, France
(c) On leave from the Faculty of Textile Science and Technology, Shinshu University, Ueda, Nagano, 386, Japan, as an Overseas Research Scholar of Japan
Communicated by D. Schwalm

Article in PDF-Format (679 KB)

Online publication: July 16, 1998
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