Fusion cross sections were measured for ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ bombardments of ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$ from 32 to 151 MeV by detecting the evaporation residues from the compound nucleus decay with gas counter telescopes. Charge, energy, and angular distributions of projectilelike fragments from the deeply inelastic collisions were also measured at 151 MeV. The fusion excitation function was analyzed through the barrier penetration model and compared to the predictions of the statistical yrast line model. The critical angular momentum and the grazing angular momentum deduced from the fusion and elastic scattering data were used in the interpretation of the kinetic energies of the deeply inelastic fragments in terms of a rotating dinuclear model.

NUCLEAR REACTIONS ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$+${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$, $E=32.5\mathrm{} \mathrm{to} 151$ MeV; measured evaporation residue $\sigma (E, \theta )$; deduced $\sigma \mathrm{}\left(E\right)\mathrm{}$ total fusion excitation function; barrier and critical parameters. $E=55.7, 63, 125, 151$ MeV; measured elastic scattering $\sigma \left(\theta \right)$; deduced optical potentials; reaction cross sections ${\sigma }_R$. $E=151\mathrm{}$ MeV; measured charge, energy, and angular distributions for $4\le Z\le 12$ fragments. Natural target. Gas ionization and Si detectors.

• Received 7 April 1982

DOI:https://doi.org/10.1103/PhysRevC.27.194