Threshold energy for sub-barrier fusion hindrance phenomenon
  The relationship between the threshold energy for a deep sub-barrier fusion hindrance phenomenon and the energy at which the regime of interaction changes (the turning-off of the nuclear forces and friction) in the sub-barrier capture process, is studied within the quantum diffusion approach. The quasielastic barrier distribution is shown to be a useful tool to clarify whether the slope of capture cross section changes at sub-barrier energies. 
V. V. Sargsyan, G. G. Adamian, N. V. Antonenko, W. Scheid, and H. Q.   Zhang
nucl-th