Potential theory of cluster photodisintegration of light nuclei

摘要

The potential theory of the cluster photodisintegration of light nuclei developed by the authors is used for the detailed study of the characteristics of two-particle processes A(gamma, b)B on the nuclei Li-6, Li-7, and Be-9 in the energy region from the threshold to E-gamma similar to 100 MeV. The key features of the theory are the wave functions of the potential cluster model such as alpha np, alpha t, and 2 alpha n, used for the nuclei under study and consistently allowing for the final-state interaction of particles. The possibility of transition from the three-particle wave functions into various cluster channels is demonstrated taking Li-6 and Be-9 nuclei as examples. Within the same theory, the radiative capture processes alpha d --> Li-6 gamma and (7)Lid --> Be-9 gamma are considered. The process characteristics are actually analyzed at the microscopic level: the specific features of the total cross sections, energy and angular distributions, asymmetry, and particle polarization are related to the energy and angular dependence of the amplitudes for multipole and partial transitions, amplitude interference, node structure of the cluster-model wave functions, resonances in particle scattering, and so on. The theory is shown to reproduce virtually all observable characteristics and produce successful predictions.