Statistical analysis of the elastic and inelastic scattering of 12C+28Si and 16O+28Si

A statistical model analysis has been performed on the thetasub(c.m.)=1800 elastic and inelastic scattering excitation functions in the energy range 27.8<=Esub(c.m.)<=31.5 MeV for the 12C+28Si system and in the energy range 30.0<=Esub(c.m.)<=32.7 MeV for the 16O+28Si system. The exact calculation of the number of effective channels for inelastic excitation gives a value of proportional1.5 corresponding to a charge of 50 in the angle at which the cross sections are measured. The Hauser-Feshback cross-sections, when compared to the experimental data, indicate very large (>=90%) direct reaction contributions to the observed cross sections. Good agreement between the theoretical and experimental distributions of the fluctuating cross sections together with the insignificant values of the cross correlation coefficients indicate that the fluctuating component of the experimental cross sections is consistent with the statistical model predictions. (orig.)