Giant dipole resonance in spectral averaging theory and analysis of experimental data for the nucleus

In the framework of spectral averaging theory, the bivariate strength density I for a transition operator takes a convolution form; , where is the strength density due to the effective one-body part h of the nuclear Hamiltonian H and is a spreading bivariate Gaussian due to the effective two-body part V of H. This convolution form is used to construct strength densities for the giant dipole operator and thereby calculate the variation of the -ray giant dipole resonance (GDR) absorption cross section with energy. This is applied to the specific case of the nucleus and an attempt is made to analyse the experimental data for the GDR built on its ground state.