Spin excitations observed in inelastic scattering polarization transfer experiments with 319 MeV protons

The polarization of the outgoing protons has been measured for small angle inelastic scattering from 90Zr and 51V with a 319 MeV incident polarized proton beam. The measured spin‐flip cross section is a direct measure of the spin excitations in the nucleus. The results for 90Zr show a large spin‐flip cross section is a direct measure of spin excitations in the nucleus. The results for 90Zr show a large spin‐flip cross section which is approximately evenly distributed between 8 and 25 MeV excitation; the Ml region is not prominent. Preliminary data for 51V also reveal large continuum spin excitations, as well as a clear peak in the Ml region. The data are discussed in relation to the search for missing spin excitation strength in the delta region and to electron scattering results.