Application of the coupled channels approach to the intermediate coupling description of photodisintegration of 1d2s-shell nuclei Original Research Article

The coupled channels approach in the shell model intermediate coupling is presented. The problems of orthonormalization of the solutions, fulfillment of boundary conditions, agreement of the effective two-body intercation with the nuclear average field and continuum discretization are considered. It is shown that in light and medium nuclei the description of the structure and decay characteristics of multipole giant resonances can be reduced to the solution of a compact algebraical system of equations. The model is applied to the description of the photonuclear reactions on the 24Mg, 28Si and 32S nuclei. The origin of the gross and intermediate structure of the dipole giant resonance (DGR) as well as the partial decay channels of the DGR are studied. It is found that the 24Mg DGR splitting results from the nuclear shape deformation.