Study of the fusion-fission process in the 35Cl +24Mg reaction

  • C. Beck
  • R. Nouicer
  • D. Mahboub
  • B. Djerroud
  • R.M. Freeman
  • A. Hachem
  • T. Matsuse
  • Sl. Cavallaro
  • E. De Filippo
  • G. Lanzanó
  • A. Pagano
  • M.L. Sperduto
  • R. Dayras
  • E. Berthoumieux
  • R. Legrain
  • E. Pollacco
Heavy ion physics

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 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • C. Beck
    • 1
  • R. Nouicer
    • 1
  • D. Mahboub
    • 1
  • B. Djerroud
    • 1
  • R.M. Freeman
    • 1
  • A. Hachem
    • 1
  • T. Matsuse
    • 1
  • 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. 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, FranceFR
  2. 2.Dipartimento di Fisica dell'Universitá di Catania, INFN and LNS Catania, I-95129 Catania, ItalyIT
  3. 3.DAPNIA/SPhN, C.E. Saclay, F-91191 Gif sur Yvette Cedex, FranceFR

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