Alpha-particle photodisintegration of light nuclei C-12 and O-16

Photoemulsion experiments, which were carried out for C-12(gamma, 3 alpha) and O-16(gamma, 4 alpha) reactions with a linearly polarized gamma beam fro m the linear LAE-2000 accelerator at the Kharkov Institute of Physics and T echnology, Ukrainian Scientific Center, are reviewed. The review focuses on analyzing the distributions of alpha particles in their in-pair relative e nergy in the final states of the reactions, in the angle of divergence, and distributions in the excitation energy of intermediate nuclei. In addition , the angular distributions of alpha particles and the energy dependence of the Sigma asymmetry of alpha particles in the case of two-particle reactio ns are also analyzed. The basic mechanism of the reactions under considerat ion is shown to be the interaction with nuclear alpha clusters.