V. Soloviev, C. Stoyanov, V. Voronov
May 9, 1983
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Journal
Nuclear Physics
Abstract
Abstract The properties of the low-lying states and giant resonances in 208Pb are calculated within the quasiparticle-phonon nuclear model, the model parameters being fixed. The fragmentation of the deep hole states 1 h 11 2 , 1 g 7 2 and 1 g 9 2 in 207Pb and 1 g 7 2 , 1 g 9 2 , 2 p 1 2 and 2 p 3 2 in 203, 205, 207Tl is calculated, and qualitative agreement with the available experimental data is obtained. The s-, p- and d-wave neutron strength functions are calculated for 206Pb + n and 207Pb + n resonances. Their energy dependence is correctly described up to 0.9 MeV above the neutron binding energy Bn. The reduced E1 transition probabilities and the total photoabsorption cross sections σγt in 206, 208Pb are calculated. It is shown that substructures observed in the energy dependence σγt are caused by the fragmentation of one-phonon states. A fine structure of the isoscalar quadrupole resonance is explained, and the description of the LEOR and HEOR in 208Pb is obtained, which is in agreement with the experimental data.