Nuclear potentials for sub-barrier fusion and cluster decay in 14C, 18O+208Pb systems

Near-barrier fusion excitation functions for the C-14 and O-18+Pb-208 reactions have been analyzed in the framework of the barrier-passing model using different forms of the nuclear potential and the phenomenology of a fluctuating barrier. The best-fit fusion potentials were used to estimate cluster decay probabilities from the corresponding ground states of Ra and Th (i.e., for the inverse decay process). The analysis supports the alpha-decay-like scenario for carbon and oxygen emission from these nuclei.