Elsevier

Nuclear Physics A

Volume 151, Issue 1, 3 August 1970, Pages 129-153
Nuclear Physics A

The giant dipole resonances in 11C and 15O observed with the reactions 10B(p, γ)11C and 14N(p, γ)15O

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Abstract

The giant dipole resonances in 11C and 15O have been studied with the capture reactions su10B(p, γ0)11C (Ep = 2.6-17.0 MeV) and 14N(p, γ0)15O (Ep = 2.2–19.0 MeV). Some similarity is observed between the giant dipole resonances in 11C and 12C and between those in 15O and 16O. The average (γ, p0) cross sections for 11C and 15O are smaller by a factor of about 3 than those for 12C and 16O. However, the dipole strength is more spread out in 11C and 15O than in 12C and 16O. A comparison of results from 15N(γ, p0)1414C and 15O(γ, p0)14N suggests the contribution of T = 32 states in the former reaction but not in the latter. The yields of the reactions 10B(p, γ1)11C and 11N(p, γ12)15O are relatively weak and only estim their upper limits are obtained. For the sharp, low-lying resonances at Ep = 2.35 and 2.48 MeV in 11N(p, γ0)15O previous assignments of 52 and 32 are confirmed. For the reson Ep = 4.20 MeV 32+ is obtained.

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  • Cited by (0)

    Supported in part by the National Science Foundation.

    Present address: Physics Department, University of Kansas, Lawrence, Kansas.

    ††

    Imperial Oil of Canada Pre-Doctoral Fellow.

    †††

    Present address: Sektion Physik der Universität München, München, Germany.

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