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• W2081285356 endingPage "630" @default.
• W2081285356 startingPage "579" @default.
• W2081285356 abstract "The present understanding of reaction processes involving light unstable nuclei at energies around the Coulomb barrier is reviewed. The effect of coupling to direct reaction channels on elastic scattering and fusion is investigated, with the focus on halo nuclei, for which such effects are expected to be most important. With the aim of resolving possible ambiguities in the terminology a short list of definitions for the relevant processes and quantities is proposed. This is followed by a review of the experimental and theoretical tools and information presently available. The effect of breakup couplings on elastic scattering and of transfer couplings on fusion is investigated with a series of model calculations within the coupled-channels framework. The experimental data on fusion are then compared to ‘bare’ no-coupling one-dimensional barrier penetration model calculations employing reasonably realistic double-folded potentials. On the basis of these model calculations and comparisons with experimental data, conclusions are drawn from the observation of recurring features. The total fusion cross-sections for halo nuclei show a suppression with respect to the ‘bare’ calculations at energies just above the barrier that is probably due to single neutron transfer reactions. The data for total fusion are also consistent with a possible sub-barrier enhancement; however, this observation is not conclusive and other couplings besides the single-neutron channels would be needed in order to explain any actual enhancement. We find that a characteristic feature of halo nuclei is the dominance of direct reactions over fusion at near and sub-barrier energies; the main part of the cross-section is related to neutron transfers, while calculations indicate only a modest contribution from the breakup process." @default.
• W2081285356 created "2016-06-24" @default.
• W2081285356 creator A5001631448 @default.
• W2081285356 creator A5038268606 @default.
• W2081285356 creator A5039058412 @default.
• W2081285356 creator A5067666076 @default.
• W2081285356 date "2007-10-01" @default.
• W2081285356 modified "2023-09-30" @default.
• W2081285356 title "Fusion and direct reactions of halo nuclei at energies around the Coulomb barrier" @default.
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