Gamma-ray studies of 12C+20Ne reactions

Excitation functions for the yields of ten residual nuclides from the 12C+20Ne reaction have been measured over the range E/sub c.m./ = 11--33 MeV in steps of 150 keV, using γ-ray techniques. The magnitude and energy dependence of the excitation functions for most partial yields, as well as for the total fusion yield, closely resemble those from the 16o+16O system when compared at the same compound-nuclear excitation energy. The total fusion yield exhibits strong anomalies at E/sub c.m./ = 22.7 and 24.1 MeV, while the 'u20Ne inelastic scattering yield exhibits a strong uncorrelated structure at E/sub c.m./ = 21.1 MeV. In addition weaker structure is seen at E/sub c.m./ = 13.6, 16.6, 18.6, and 26.3 MeV in the total fusion yield. The 24.1 meV resonance corresponds to a characteristic structure in the 16O+16O reaction yields. Both structures appear at the same 3'u2S excitation energy and are found to be correlated with the transition to regime of limited fusion