Abstract

A statistical model analysis has been performed on theθc.m.=180° elastic and inelastic scattering excitation functions in the energy range 27.8≦Ec.m.≦31.5 MeV for the12C+28Si system and in the energy range 30.0≦Ec.m.≦32.7 MeV for the16O+28Si system. The exact calculation of the number of effective channels for inelastic excitation gives a value of ~1.5 corresponding to a change of 5° in the angle at which the cross sections are measured. The Hauser-Feshbach 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.

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