Boson-Broadened Photonuclear Reactions in Light Nuclei

The giant dipole resonances in light nuclei are described by an intermediate-coupling model which attributes their fine structure and widths to the coupling between single-fermion states and collective bosons associated with the quasistationary stage of the reaction. This model can reproduce details in the giant resonances of ${\mathrm{O}}^{16}$ and ${\mathrm{Si}}^{28}$, such as the over-all envelopes of the total width, the relative intensities of various major and minor peaks, and the widths of minor resonances.