Abstract

Angular distributions were obtained for elastic and inelastic scattering of 41 MeV alpha particles by Ti 48, Fe, Ni, Zn, Zn 64 and Sr. In all targets excitation by inelastic scattering is strongest for the low-lying 2 + levels, usually described in terms of quadrupole surface vibrations, and for the “anomalous” levels of somewhat higher excitation. The results for both elastic and inelastic scattering are analyzed in terms of a strong absorption diffraction scattering model. Parameters associated with collective interpretations of both types of levels are estimated and compared with values of the corresponding quantities derived from Coulomb excitation and electron scattering experiments. Reasonable agreement is obtained in the quadrupole excitation analyses. Strong support is given for 3 − assignments for the anomalous levels and for their interpretation in terms of surface octupole vibrations.

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