Systematic study of projectile structure effect on fusion barrier distribution
Abstract
Quasielastic excitation function measurement has been carried out for the 4He + 232Th system at θlab=160 with respect to the beam direction, to obtain a representation of the fusion barrier distribution. Using the present data along with previously measured barrier distribution results on 12C, 16O, and 19F + 232Th systems a systematic analysis has been carried out to investigate the role of target and/or projectile structures on fusion barrier distribution. It is observed that for 4He, 12C, and 16O + 232Th, reactions the couplings due to target states only are required in coupled channel fusion calculations to explain the experimental data, whereas for the 19F+ 232Th system along with the coupling of target states, inelastic states of 19F are also required to explain the experimental results on fusion-barrier distribution. The width of the barrier distribution shows interesting transition behavior when plotted with respect to the target-projectile charge product for the above systems.
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