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No abstract

le o eceived June 1968 ifferential cross sections and asymmetries for 5® MeV proton scattering from vibrational states in ® D , r®n and ""C have been analysed using a collective-modrl interaction obtained by deforming the entire optical potential. The strong single-phonon states (2+ and 3-) are well described, while predictions for weak two-phonon states are less successful .

Elastic and inelastic scattering of unpolarized 40-MeV protons from 12 C, 54 Fe, 66 Fe, 58 Ni, 60 Ni, and 208 Pb have been analyzed using the optical-model potential and its collective-model extension in the distortedwave approximation. Fits to the inelastic scattering from 24 Mg and to the elastic scattering from 27 A1, 66 Cu, Sn, and 181 Ta also are included. The Woods-Saxon shape parameters for the potential differ from those suggested for scattering at lower energies, and either surface or volume forms of the imaginary part produce good agreement with the data. To describe the inelastic scattering best, it is found necessary to deform the imaginary (as well as the real) part of the central potential. The deformation parameters obtained are in reasonable agreement with those found by other methods.