Elastic Scattering of Oxygen Ions by Boron 10 and 11

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Elastic scattering measurements have been carried out on 16O+10B and 16O+11B systems using beams of 16O ions of precisely defined energy from the Kyoto University tandem accelerator. Measurements have been made for energies near and above the Coulomb barrier appropriate to each system. The scattering particles were identified by means of the two-detectors fast-slow type coincidence system. The angular distributions for 16O+10B scattering show a smooth angular dependence, but in the case of those for 16O+11B scattering, diffraction structure was observed. The excitation curves of both systems have a smooth, nearly monotonic, energy dependence. A complex optical potential model has been used to describe the elastic scattering data. Using a Woods-Saxon form for both the real and imaginary potentials, fairly good agreement with the experimental data was obtained. The imaginary part of potentials increases with energy (about a MeV per MeV) in the energy range studied. There is one difference of the imaginary potential of 2 MeV as a whole in two scattering systems.

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