Fusion of light proton-rich exotic nuclei at near-barrier energies
Abstract
We study theoretically fusion of the light proton-rich exotic nuclei 17F and 8B at near-barrier energies in order to investigate the possible role of breakup processes on their fusion cross sections. To this end, coupled channel calculations are performed considering the couplings to the breakup channels of these projectiles. In case of 17F, the coupling arising out of the inelastic excitation from the ground state to the bound excited state and its couplings to the continuum have also been taken into consideration. It is found that the inelastic excitation/breakup of 17F affect the fusion cross sections very nominally even for a heavy target like Pb. On the other hand, calculations for fusion of the one-proton halo nucleus 8B on a Pb target show a significant suppression of the complete fusion cross section above the Coulomb barrier. This is due to the larger breakup probability of 8B as compared to that of 17F. However, even for 8B, there is little change in the complete fusion cross sections as compared to the no-coupling case at sub-barrier energies.
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