Speaker
Description
Photo-nuclear absorption cross sections are very important data for the study of nuclear structure, nuclear astrophysics and nuclear applications. The photo-nuclear absorption cross sections of 236 nuclei ranging from 40Ca to 209Bi are studied by relativistic quasiparticle finite amplitude method (QFAM) based on the axially deformed relativistic Hartree-Bogoliubov (RHB) approach, with extensions to odd-A nuclei. In this method, deformation degree of freedom is accounted for in an efficient way, which allows the reproduction of the double-peak structure in the photo-nuclear absorption cross sections. Good agreement was achieved for giant dipole resonance (GDR) peak energies, while resonance widths were underestimated and hence peak cross sections were overestimated due to the lack of higher-order many-body correlations. To account for this problem, the quasiparticle vibration coupling approach is further employed for the study of photo-nuclear absorption cross sections, which could reproduce the experimental width well.
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