Effect of nonlocality on sub-barrier fusion enhancement

Abstract

The effect of nonlocality on heavy ion fusion is discussed at sub-barrier energies. It is shown that a simple barrier penetration model with a nonlocal ion-ion potential cannot reproduce the coupled channel results, though it gives rise to fusion enhancement at low energies. It is further shown that the coupled channel effects are important for fusion around the Coulomb barrier energies whereas the nonlocal effects give a large cross section enhancement at deep sub-barrier energies.