Disagreement between capture probabilities extracted from capture and quasi-elastic backscattering excitation functions

Abstract

Experimental quasi-elastic backscattering and capture (fusion) excitation functions are usually used to extract the s-wave capture probabilities for the heavy-ion reactions. We investigated the ${}^{16}$O+${}^{120}$Sn,${}^{144}$Sm,${}^{208}$Pb systems at energies near and below the corresponding Coulomb barriers and concluded that the probabilities extracted from quasi-elastic data are much larger than the ones extracted from fusion excitation functions at sub and deep-sub barrier energies. This seems to be a reasonable explanation for the known disagreement observed in literature for the nuclear potential diffuseness derived from both methods.

9 pages, 3 figures

References in corpus (2)

• A systematic study of the fusion barriers using different proximity type potentials for $N=Z$ colliding nuclei : New extensions
• The role of surface energy coefficients and nuclear surface diffuseness in the fusion of heavy-ions