Resonance absorption and fluorescence of plane-polarized monoenergetic photons in 208Pb

Level parameters in 208Pb have been determined by means of the resonance gamma-ray absorption technique and measurement of the azimuthal distribution of the elastic scattering of plane-polarized photons. The radiation was produced in suitably chosen (p,γ) reactions. The 7.1 MeV doublet was found at Ex=7063.5±0.2 and 7083.3±0.3 keV with ground-state radiation widths of 19.1 ± 1.5 and 9.1 ± 1.3 eV. A unique negative parity assignment could be made to both levels, in agreement with other observations. The 4.84 MeV bound level has an excitation energy Ex=4842.2±0.2 keV, and is most probably a Jπ=1+ level