Experimental study of the 17F+ 12C fusion reaction and its implications for fusion of proton-halo systems
Abstract
The halo nature of the low-lying 1/2+ first excited state of the exotic weakly-bound proton drip-line nucleus 17F has long been hypothesized. The structure of such a halo nucleus would imply special nuclear properties including, possibly, an enhancement in its fusion cross section above the barrier. The total fusion cross section of 17F + 12C near the Coulomb barrier was studied using the newly developed "Encore" active-target detector at Florida State University. Total fusion cross sections for the stable counterpart systems 16O + 12C and 19F + 12C were also measured to enable a systematic comparison. No influence of the halo nature of the 17F 1/2+ first excited state on its fusion excitation function was observed when compared with the stable counterpart systems.
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