COULOMB-NUCLEAR INTERFERENCE IN 56 MEV DEUTERON BREAKUP AT EXTREME FORWARD ANGLE

Recently measured C-12(d,pn)C-12 breakup data show a dip in the energy integrated cross section below a momentum transfer similar to 117 MeV /c. We analyse these data by the prior form distorted-wave Born approx imation theory. Although the double humped structure of the theta(p) = theta(n) = 0 degrees data exhibit the dominance of Coulomb-breakup, t he pronounced asymmetry of the energy sharing data cannot be explained through Coulomb breakup only. A closer agreement to the data is obtai ned through Coulomb-nuclear interference and an unusual optical potent ial of longer range in the exit channel.