Abstract

High resolution measurements of the reaction $^{12}\mathrm{C}$(\ensuremath{\gamma},n) at ${\mathit{E}}_{\ensuremath{\gamma}}$\ensuremath{\sim}58 MeV are presented. The distribution of strength to the resolved bound final states in $^{11}\mathrm{C}$ is compared with that of $^{11}\mathrm{B}$ obtained in previous analogous (\ensuremath{\gamma},p) measurements and the implications for the theoretical description of (\ensuremath{\gamma},N) reactions are discussed. These new results confirm the importance of two-nucleon effects in intermediate energy photon absorption and highlight inadequacies in state-of-the-art microscopic calculations of (\ensuremath{\gamma},N) reactions.

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