Sub-coulomb fusion excitation function for 12C + 12C

Fusion excitation functions are measured for the a, p and n evaporation channels in the fusion of the 1 2 C + 1 2 C system at center of mass energies between 4.5 and 6.5 MeV, with energy steps of 75 keV. The γ-ray technique is used with a new absolute normalization method which is independent of charge collection and allows at the same time to monitor the Carbon buildup on the target. Good agreement is obtained with absolute cross section values previously measured using particle detection techniques, but smaller energy steps are used in the present experiment. As in previous works much structure is seen in the excitation function wich is consistent with the positions of resonances reported in the literature for this system.