EFFECT OF NONLOCALITY ON SUBBARRIER FUSION ENHANCEMENT

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