Abstract
The inelastic proton spectra in the giant resonance region have been studied with 155 MeV protons on 27Al, 40Ca, Fe, 89Y, 115In, Sn, 165Ho, 181Ta, 197Au, 208Pb and 209Bi. For all nuclei a strong resonance at E = (63.0 ± 1.5) A − 1 3 MeV is seen, with an angular distribution in agreement with L = 2 DWBA calculations. The resonance exhausts between 50 % ( 40Ca) to 14 % of the energy weighted sum rule. Fine structure similar to that reported in electron scattering experiments is observed for 208Pb. In addition some other possible excitations are discussed.
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