Elsevier

Nuclear Physics A

Volume 248, Issue 2, 25 August 1975, Pages 214-236
Nuclear Physics A

The reactions 18O(p, p)18O and 18O(p, p')18O(1.98 MeV) for Ep = 3.8–6.1 MeV

https://doi.org/10.1016/0375-9474(75)90163-3Get rights and content

Abstract

Angular distributions of cross sections and analyzing powers have been measured for 18O(p, p)18O and 18O(p, p1)18O (1.98 MeV) in 25 keV intervals for proton energies between 3.8 and 6.1 MeV. A phase-shift analysis of the elastic scattering data was carried out, yielding resonance parameters for 16 levels in 19F in the excitation energy region 11.6–13.8 MeV. The results generally are in good agreement with previous work. On the basis of spin, parity, excitation energy and a comparison of reduced proton widths with reduced neutron widths of levels in 19O, an assignment of T = 32 could be made to at least five of the levels, including the analog of the broad 32+ level in 19O at 5.45 MeV. A Legendre-polynomial analysis of the inelastic scattering data suggests that the cross section for proton energies between 5.0 and 5.5 MeV is dominated by the broad 32+ resonance at Ep = 5.15 MeV.

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    Work supported in part by the US National Science Foundation.

    ††

    Present address: Département de Physique, Université Laval, Quebec, Canada, G1K-7P4.

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