Inelastic scattering of O-18 and O-17 ions from medium-weight nuclei
Jun, 1979
12 pages
Published in:
- Phys.Rev.C 19 (1979) 2224-2236
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Abstract: (APS)
Inelastic scattering of O18 and O17 ions from various target nuclei in the mass range A=48−92 has been investigated at incident energies between 54 and 69 MeV. Angular distributions for the excitation of the first excited states in the target nuclei are well reproduced by conventional distorted-wave Born approximation calculations with B(E2) values from the literature, and equal charge and mass deformation lengths. The measured angular distributions for the excitation of the first excited state in O18 are, however, shifted to forward angles by 2°-5° (c.m.) with respect to the theoretical calculations. This shift is more pronounced for target nuclei near closed neutron shells. Furthermore, O18 and O17 induced one and two neutron transfer reactions on some of these nuclei have been measured. The systematics observed in our inelastic scattering and transfer studies suggest that two step processes including neutron transfer channels as intermediate steps are responsible for these observed shifts.
NUCLEAR REACTIONS Ti48(O18, O18), E=45 MeV; Cr52(O18, O18), E=56 MeV; Fe54(O18, O18), E=60 MeV; Ge72(O18, O18), E=68.6 MeV; Zr91(O18, O18), E=68.6 MeV; Zr92(O18, O18), E=68.5 MeV; measured σ(θ) for g.s. and first 2+ states in O18, Ti48, Cr52, Fe54, Ge72, Zr92 and for first 12+ state in Zr91. Fe54(O17, O17), E=59.1 MeV; Ni60(O17, O17), E=62.1 MeV; measured σ(θ) for g.s. and first 2+ states in Fe54, Ni60 and for first 12+ state in O17. Ge72(O18, O18), E=30−48 MeV, θlab=175°; measured σ(E) for the first 2+ states in Ge72 and O18. Fe54(O18, O17), E=56 MeV; Sn120(O18, O17), E=72 MeV; measured σ(θ) for low lying states. Fe54(O17, O16), E=59.1 MeV; Ni60(O17, O16), E=62.1 MeV; measured σ(θ) for low lying states. Optical model, DWBA, deformation parameters. Enriched targets.References(59)
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