[en] One tries to find a way to discriminate between fission following fusion and deep inelastic processes with large mass transfer. Fragment analysis (kinetic energy, mass, charge distributions) gives generally no answer. The deexcitation properties of the fragments (gamma ray, charged particles and neutron emission) are difficult to interpret, and only recent results concerning neutron emission show different patterns for both processes. The reasons for which a system evolves towards deep inelastic processes rather than fusion are discussed

[en] Dynamical aspects associated with the binary dissipative collisions induced by heavy ions at intermediate energies are reviewed. A particular attention is paid to the mid- rapidity emission which is proved to enlight the reaction mechanism. Recent experimental data obtained by the INDRA and DEMON Collaborations as well as new Landau-Vlasov calculations are presented. Consequences on the energy dissipation, on the excitation energy between the partners and on the temperature of the equilibrated fragments are discussed

No abstract available

[en] The french-belgian neutron array DEMON has been used at GANIL in three different experiments related to the dynamics of binary collisions, the hot nuclei decay and the neutron halo in light nuclei. Motivations and very first results are discussed. (author). 31 refs

[en] The fusion-fission process for the synthesis of superheavy elements is discussed on the basis of the fluctuation-dissipation model. We employ three-dimensional langevin equation. We investigate the fusion-fission process by analyzing not only the mass distribution of fission fragments but also the neutron multiplicity in fusion-fission process

[en] Some experimental data concerning fusion cross-sections cannot be fully understood in the framework of the rotating liquid drop model. Studying the mass distribution of ''fission'' products, it was shown that a large broadening is registered when fission barrier vanishes. This change is interpreted as a signature for a new mechanism intermediate between fusion and deep inelastic reactions. The conditions under which such a mechanism can be observed are discussed and very recent experimental results obtained using ALICE heavy ions facility are presented. (author)

No abstract available

[en] Fusion-like reactions induced on medium mass targets by 27 MeV per nucleon argon projectiles were studied. The properties of evaporation residues and binary fission fragments, both cold remnants of fusion nuclei, show that highly excited nuclei were produced, near the temperature of instability of nuclear matter. Fission-evaporation competition in the deexcitation of these nuclei is reflected in the ratio of fission and residue cross sections, which provides a way of studying the role of prefission evaporation and fission barriers in the deexcitation process

No abstract available

[en] Total reaction cross-sections with H.I. from 30 to 100 MeV/nucleon are measured by means of the associated 4π-γ-ray detection method. The results cover a wide span of targets for various stable and neutron-rich beams. The validity of the method is shown in a combined systematics including also the results of beam transmission-type experiments. The data are confronted to the predictions of low-energy and high-energy models. The authors also show that they are well described by the empirical formula developed by KOX et al. The method is applied to secondary neutron-rich fragment beams produced by a 44 MeV/n ²²Ne beam on ¹⁸¹Ta target and transported by the Ganil Lise spectrometer to interact with a Cu target. The measured σ_R are discussed in terms of the reduced strong absorption radius r₀ and compared with other experimental results