Abstract
Based on the quantum interference between two-identical-nucleus scattering at energies around the Coulomb barrier, the barrier positions for 58Ni+58Ni and 16O+16O are extracted from Mott oscillations in the angular distributions around 90° for the first time. The angle separation of pairs of Mott scattering valleys around 90° has a direct relationship with the closest distance between two nuclei in elastic scattering. Together with the barrier height from fusion excitation function, the extracted barrier position provides a sensitive probe to constrain the model predictions for the nucleus–nucleus potential barrier.
Highlights
Detectors dσ/dΩ (mb/sr) data from Ref. [39] for the same reaction. It is required to further investigate the barrier position from heavy-ion fusion/scattering cross sections
Detectors dσ/dΩ data from Ref. [39] for the same reaction
For heavy-ion fusion and scattering reactions, the Coulomb barrier directly influences the behavior of fusion and scattering cross sections, and an accurate extraction of the barrier the height and the position and curvature from fusion cross sections and angular distributions of elastic/inelastic scattering attracted a lot of attentions in many decades
Summary
Detectors dσ/dΩ (mb/sr) data from Ref. [39] for the same reaction. It is required to further investigate the barrier position from heavy-ion fusion/scattering cross sections. For heavy-ion fusion and scattering reactions, the Coulomb barrier directly influences the behavior of fusion and scattering cross sections, and an accurate extraction of the barrier the height and the position and curvature from fusion cross sections and angular distributions of elastic/inelastic scattering attracted a lot of attentions in many decades.
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