A study of proton scattering on A=92-116 nuclei with extended optical models and the interacting boson approximation

Differential cross sections for proton elastic and inelastic scattering have been measured at Esub(p) = 22.3 MeV for 14 nuclei with 92 <= A <= 116. The energy dependence has been studied for 104Pd between 10 and 35 MeV. Nuclear structure effects found in the analysis of elastic scattering are identified with strong couplings between ground and one-phonon states. These couplings are satisfactorily described by traditional collective models, using deformation parameters in agreement with those deduced from electromagnetic data. The transitions to weakly excited states require a more accurate spectroscopic description. Spectroscopic amplitudes taken from the interacting boson model are used. The radial dependence of transition densities is derived from optical model potentials. (orig.)