Elastic scattering threshold anomaly and near-barrier heavy-ion fusion

Abstract

From an analysis of heavy-ion elastic scattering and fusion data available for three systems, Udagawa et al. presented evidence that the "threshold barrier" (T) determined from fusion is approximately equal to the "threshold energy" (E_a) extracted from the imaginary part of optical potential for elastic scattering in the vicinity of the Coulomb barrier. We have extended this investigation to include seven more systems for which the relevant data are available. Furthermore, from a comparison of sets of ΔV, the polarization potential (deduced from elastic scattering), and B-T, the barrier difference (deduced from fusion) values, it is suggested that the two quantities are correlated.