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[en] Full text: The ⁹Be projectile breakup (⁹Be → ⁸Be+n → α+ α + n) has been investigated for ⁹Be+¹²C reaction at a bombarding energy E_Lab = 21 MeV. The ⁸Be energy spectra were reconstructed using α + α coincidence measurements. A preliminary analysis of these spectra suggests that for the high energy region the main contribution is due to neutron transfer to the ¹²C target, and the low energy region of the spectrum can be attributed to the ⁹Be non-capture breakup process. We also measured elastic scattering angular distributions at energies around the Coulomb barrier (E_Lab = 13.0, 14.5, 17.3, 19.0 and 21.0 MeV) in order to check the possible occurrence of a threshold anomaly in the optical potential. The data were analyzed in the framework of the Sao Paulo potential and, within the experimental uncertainties, the existence of this threshold anomaly could not be confirmed. The experimental elastic scattering angular distributions were well described by the optical potential at forward angles for all measured energies. However, for the three highest energies, an enhancement was observed for intermediate and backward angles. This could be explained by the elastic transfer mechanism. (author)

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[en] In this work, angular distribution measurements for the elastic channel were performed for the ⁹Be + ¹²C reaction at the energies E_Lab=13.0, 14.5, 17.3, 19.0 and 21.0 MeV, near the Coulomb barrier. The data have been analyzed in the framework of the double folding Sao Paulo potential. The experimental elastic scattering angular distributions were well described by the optical potential at forward angles for all measured energies. However, for the three highest energies, an enhancement was observed for intermediate and backward angles. This can be explained by the elastic transfer mechanism.

[en] A study of the kinematics of the α -d coincidences in the ⁶Li+⁵⁹Co system at a bombarding energy of E_lab=29.6 MeV is presented. With exclusive measurements performed over different angular intervals it is possible to identify the respective contributions of the sequential and direct projectile breakup components. The angular distributions of both breakup components are fairly well described by the Continuum-Discretized Coupled-Channels framework (CDCC). Furthermore, a careful analysis of these processes using a semiclassical approach provides information on both their lifetime and their distance of occurrence with respect to the target. Breakup to the low-lying (near-threshold) continuum is delayed, and happens at large internuclear distances. This suggests that the influence of the projectile breakup on the complete fusion process can be related essentially to the direct breakup to the ⁶Li high-lying continuum spectrum. (orig.)