Inelastic scattering of electrons from 90Zr

The states of 90Zr up to 5.8 MeV excitation energy have been studied by (e, e') in the momentum transfer range from 0.29 to 1.07 fm-1. Ground state transition probabilities and transition radii were obtained for the levels excited. Previously published electron scattering data on 90Zr are included in the extraction of these parameters. A comparison of results is made with the model independent measurements of the (gamma, gamma ') reaction for the 2+ states. Wherever possible, the results for the electromagnetic transition rates are compared with the iso-scalar transition rates and those obtained form (p, p') reactions. Theoretical calculations are seen to be inadequate to describe the strength of the transitions observed in the present experiment.