Abstract
Differential cross sections for the excitation of the 3 1 −, 5 1 −, 5 2 −, 7 1 −, 2 1 +, 4 1 +, 6 1 + levels in 208Pb by 61.2 MeV protons have been measured. The results of collective-model and microscopic-model calculations are compared with the data. A “realistic” two-body interaction is used in the microscopic calculations. Transition densities obtained from electron scattering data and particle-hole wave functions are both considered. The results obtained using the electron scattering transition densities are quite good and provide an indication that ϱ n ≧ ϱ p for these excitations. The results obtained using the theoretical transition densities give only qualitative reproduction of the data. Finally, some discrepancies in earlier analyses of 208Pb+p data are resolved.
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