Elsevier

Nuclear Physics

Volume 80, Issue 2, May 1966, Pages 449-464
Nuclear Physics

12C(d, pγ)13C angular distributions and correlations near threshold

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Abstract

Proton-gamma angular correlations from the 12C(d, pγ)13C on through the 3.68 and 3.85 MeV states of 13C have been measured at bombarding energies from 2 to 3 MeV and at a strong Ed = 2.50 MeV resonance. Yield curves and proton angular distributions for these groups and for protons leaving 13C in the 3.09 MeV state have also been measured. These reactions satisfy the condition Ed ≃ −2Q for which distortions of plane wave stripping theory might be expected to be small. The correlation anisotropies are maximum and the symmetry axis shifts and azimuthal anisotropies are almost zero both at the minimum bombarding energy and at the 2.50 MeV resonance. Highly distorted correlations and distributions are seen at only 2.62 MeV. The 12C(d, p)13C3.85 angular correlation at Ed = 2.50 MeV involves single-particle resonances both in 14N and in 13C and is an interesting example of a resonant direct reaction. The reduced widths derived from plane wave stripping theory are too low by factors of 3 to 10 and are energy dependent. Thus, while distortions clearly affect reduced widths, the detailed angular properties of the reactions are very closed to the predictions of plane wave theory.

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  • Cited by (0)

    Now at Babcock and Wilcox, Lynchburg, Virginia.

    ††

    Now at Florida State University, Tallahassee, Florida.

    †††

    Now at Oakland University, Rochester, Michigan.

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