Study of the de-excitation of the 44Ti nuclei light charged particles

The deexcitation process of the 44Ti compound nuclei, produced by fusion-evaporation reactions, has been studied at bombarding energies Elab < 10 MeV/A. This work is based on the study of reaction mechanisms between light-heavy ions (A <60) by mean of light charged particle spectroscopy with the ICARE charged particle detector array, installed at the IReS of Strasbourg. The α-like nuclei 44Ti has been populated through two reactions: 16O + 28Si at bombarding energies Elab(16O) = 76, 96 and 112 MeV, and 32S + 12C at Elab(32S) = 180 and 225 MeV. The exclusive experimental data, angular and energy distributions, have been analysed with the statistical code CACARIZO. The well identified evaporation channels have been precisely studied to determine the energy distributions of the residual nuclei. The calculations reproduce the sequential emission of α particles in the deexcitation chains, however, the emission of nucleons is partially misunderstood. In both reactions, the energy distribution of the protons indicates a temperature in residual nuclei lower than predicted. The dynamical deformation induced for the highest angular momenta has been quantified with an axis ratio of 2:1. (author)