89Y(p, p') Reaction at 14.71 MeV

Abstract

Excited states in 89 Y have been investigated by studying elastic and inelastic scattering of 14.71 MeV protons. The scattered protons were detected with a broad range magnetic analyser. The angular distributions of the proton groups corresponding to the ground and thirteen excited states in 89 Y were obtained. The elastic scattering data are analysed with the optical potential model. All the angular distributions obtained for the inelastic scattering are analysed with the DWBA of one phonon excitation process. The analysis with a single particle excitation process is made for the 0.894 MeV (9/2 + ) and 1.50 MeV (1/2 + ) states and a pretty good fit is obtained for the 0.894 MeV state. The structure of the theoretical curve for the 1.50 MeV state is similar to that of the experimental data. On the basis of these results, the character of the excited states in 89 Y is discussed.