Elsevier

Nuclear Physics A

Volume 384, Issue 3, 23 August 1982, Pages 414-448
Nuclear Physics A

The (γ, n) reaction on 16O between giant resonance and pion threshold

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Abstract

A new TOF facility has been built for measurements of differential (γ, n) cross sections to discrete final states of light nuclei in the photon energy range between giant resonance and pion threshold. The observed neutron angle θn can continuously be varied between 0° and 150°, and additionally measurements at 175° and 180° are possible. Differential cross sections for the reaction 16O(γ, n0)15O are presented for Eγ = 60 MeV (40° ⩽ θn ⩽ 149°) and for θn = 90° (60 MeV ⩽ Eγ ⩽ 160 MeV). The results, combined with the corresponding (γ, p0) cross sections, indicate an absorption mechanism of high energy photons by neutron-proton pairs.

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    This work is part of a Ph.D. thesis (H.G.) and a Habilitationsschrift (B.S.) and has partly been supported by the Deutsche Forschungsgemeinschaft (H.G.).

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