Elastic and inelastic scattering of 12C ions on 12C and 208Pb targets have been measured at the incident energies per nucleon E / A = 120 MeV/u and E / A = 200 MeV/u. Optical-model analysis is reported and nuclear surface transparency effects are discussed, together with the nuclear potential-energy dependence. The transparency region extends down to a radial internuclear distance of about 3 fm for the 12C-12C system and 8 fm for the 12C-208Pb system. A decrease of the imaginary potential with increasing incident energy is deduced for the two systems. Anomalous collapse of the real potential in the surface region is observed for 12C-208Pb system at 200 MeV/u. DWBA analysis of data on the 2+, 4.4 MeV state of 12C is reported and trends for the energy dependance of mean-field excitations are deduced.

Elastic scattering of 94 MeV/nucleon 16O on 40Ca, 90Zr, and 208Pb was measured, completing similar measurements on 12C and 28Si. Optical model analysis of the whole set of data shows that the sensitive region where the nuclear potential is determined moves inwards as the mass of the target decreases. This determination is more precise for light systems which present a strong negative angle scattering contribution in the angular distribution. The data have also been analyzed in the framework of the folding model using density independent and density dependent nucleon-nucleon interaction. In both cases, the resulting potentials have to be renormalized to get a good description of the data. The data are consistent with a smooth decrease with energy of both the real and imaginary potentials.

16O + 28Si elastic scattering has been measured at ELab=94 MeV/nucleon. The angular distribution is sensitive to the real part of the ion-ion potential over a broad domain extending from 5 to 8 fm. i.e. well inside the strong absorption radius (7.3 fm) and overlapping the sum of the nuclear radii (5.7 fm). The data are not well described by a standard double-folded potential based on the M3Y interaction. A good fit is obtained when using a density-dependent generalization of this interaction.

12C + 12C elastic scattering has been measured at E/A = 120 MeV/u and 200 MeV/u. Large surface transparency is observed which allows to determine the potential value down to small internuclei distance (R ∼ 3 fm). A phenomenological analysis of the results shows the onset of a large transparency at higher energy. The real potential strength is found to decrease rapidly with the increasing incident energy, whereas a similar decrease of the imaginary part at the sensitive distance is combined with an increase of the diffuseness.

Heavy ions with mass A < 14 andEA ∼ 120 MeV have been identified in the focal plane of a magnetic spectrometer by means of a simple telescope made of two slabs of plastic scintillator. The method should be applicable up to A ∼ 20 in mass and down to EA ∼ 50 MeV in energy per nucleon.

Elastic scattering of 288,340,480 and 699 MeV Alpha-particles was measured on 208Pb, 116Sn and 58Ni. The data were analysed in terms of a phenomenological optical model. The optical potentials obtained were found to vary consistently with the target nucleus and the incident energy. The radial zone where the potentials are well determined was studied in detail. The data for 208Pb were also analysed with a folding model. The energy dependence of the strong-absorption radius and of the reaction cross section shows that the nuclear surface becomes slightly transparent for incident energies above 150 MeV per nucleon.

The coherence width of the compound nucleus can be obtained from cross correlations of the energy spectra taken at different energies instead of the correlation function of the excitation function. In this way it is sufficient to cover an incident energy interval of the order of the compound nucleus width. We have applied this method to the reaction 12C + 28Si. The coherence width of 40Ca is found in reasonable agreement with previous determinations. Indication is obtained for the presence of a second (smaller) coherence width which could correspond to anomalous long-living compound nucleus states.

Inelastic scattering of 340 MeV and 480 MeV α-particles has been measured on 58Ni, 116Sn and 208Pb up to 60 MeV excitation energy. Consistent background subtraction and multipole analysis has provided the repartition of multipole strength for all three nuclei. The so-obtained response functions show the already known low-energy giant resonances in a detailed way, as well as new giant resonances at high energy.

Elastic scattering angular distributions of 44 MeV/u 40Ar ions on 60Ni, 120Sn and 208Pb targets have been measured in the forward angle region. Optical model analysis shows that near the grazing angle, the angular distributions are refractive and dominated by the Coulomb rainbow. The potentials have a smaller radius than empirical potential which fit low-energy data: this is consistent with a reduction of the real-ion potential at high energy.

Angular correlations of light particles are calculated for sequentially statistical decay following fusion. It is shown that these correlations are sensitive to the deformation, and the calculation iscompared to experiment data for the reaction28Si(12C, 2α)32Sgs. It is not possible to reproduce the angular correlation governed by the angular momenta of the first step transition40Ca →36Ar* using standard transmission coeffecient. Good quantitative agreement is obtained intoducing a strong deformation (β2 ∼ 1.1) compatible with the deformation of fusion state as predicted from the TDHF calculations, but much higher than expected from the rotating liquid drop model.

Inelastic scattering of 480 MeV and 340 MeV α particles on 208Pb, 116Sn and 58Ni has been used in a search for high excitation energy giant multipole resonances, up to E* = 60 MeV for 208Pb and E* = 45 MeV for 116Sn and 58Ni. Above the well known quadrupole and monopole resonances, there is clear evidence for a very wide set of negative parity modes (including the already known high energy octupole), followed and mixed with another very wide set of positive parity resonances, extending up to the limits of the experimental spectra.

Elastic scattering of 16O on 148, 150, 152Sm isotopes and inelastic scattering leading to the first 2+ state for the three isotopes and the 4+ state for 152Sm have been measured at several energies in the vicinity of the Coulomb barrier. The whole set of data was reproduced at forward angles with an effective potential taking into account Coulomb excitation and in the full angular range by CCBA calculations including separate nuclear and Coulomb deformations.

Elastic and inelastic scattering of 16 O on 40 Ca has been measured, focusing interest on the small oscillations in the mid-angle region. Semiclassical analyses of the elastic scattering following Fuller, Brink-Takigawa and Da Silveira have been performed and indicate that these oscillations are due to interferences between refracted trajectories and not to diffraction phenomena. The signature of refraction is also obtained from the observation of the Da Silveira phase rule between elastic and inelastic scattering.

Compilation of energy levels of A = 11 and 12 nuclei, with emphasis on material leading to information about the structure of the A = 11 and 12 systems.

Excitation functions have been measured for elastic and inelastic proton scattering in the energy range Ep = 8.7–10.3 MeV on 145Nd and Ep = 7.5–10.8 MeV on 147Sm. Their analysis have completed the qualitative results obtained by (d, p) and (n, γ) reactions. Angular momenta, elastic partial widths Γp and an order of magnitude of the inelastic proton widths ΩΓp have been determined for several resonances.