Abstract
Experimental fusion excitation functions have been fitted for several systems using an energy-dependent barrier-penetration model as suggested in our earlier work where the barrier height is written as a function of the radial kinetic energy {var epsilon} at the interaction barrier. This form of the energy dependence of the fusion barrier leads also to an implied {ital l} dependence of the barrier. It is shown that the enhancement of {l angle}{ital l}{r angle} over {l angle}{ital l}{r angle}{sub {ital o}{ital d}} predicted by a simple energy-independent barrier-penetration model is maximum around the Coulomb barrier. A correlation has also been oberved between this maximum enhancement factor and the product of the charges of the colliding nuclei.
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