FUSION DISTRIBUTION IN O-16, SI-28-115 REACTIONS AT NEARBARRIER AND SUBBARRIER ENERGIES(IN)

Measurement of various moments of the angular momentum distribution in fusion reactions of O-16, Si-28+In-115 has been carried out at near- and below-barrier energies using a multielement EGO multiplicity detec tor set-up. Fusion events were selected using the alpha particle evapo ration events at backward angles with respect to the beam direction. I t is found that for the O-16+In-115 reaction, the moments of the l dis tribution match well with the calculations based on the one-dimensiona l barrier penetration model,whereas in the case of the Si-28+In-115 re action, the experimental values are higher than the predictions of the above theoretical calculations, and could be explained by incorporati ng the coupling of projectile deformation in the barrier penetration c alculations. The present work brings out the role of projectile deform ation in enhancing the higher moments of the fusion I distribution aro und barrier energies.