Abstract
A simultaneous Distorted Wave Born Approximation calculation of elastic scattering, fusion and breakup cross sections for energies around the Coulomb barrier is presented for reactions involving weakly bound projectiles on a medium size target. A Woods-Saxon optical potential is used, for which the imaginary part is split into a volume part W F which is responsible for fusion reactions and a surface part W D R which accounts for direct reactions. Energy dependent forms for W F and W D R are then extracted from recent data. By the use of the dispersion relation, the corresponding real polarization potentials V F ( E ) and V D R ( E ) are also determined. As a result, a new type of anomaly is present, the so called Breaukup Threshold Anomaly.
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