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Abstract摘要
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EMPIRE-3.2 system (codename Malta) is being used in the advanced modelling of neutron induced reactions on U-238 nucleus aimed at improving our knowledge of the neutron scattering. A new rotational-vibrational dispersive optical model potential is used that couples the low-lying collective bands of vibrational character below 1.1 MeV of excitation energy. Octupole, beta-, gamma- and non-axial vibrational bands are included in the calculations. Theoretical calculations of the elastic cross section, the average angle of elastic scattering (mu-bar) and compound nucleus (CN) formation cross section are compared with selected experimental data. Reduction of the uncertainty of the CN formation cross-sections for neutron-induced reactions on U-238 is discussed. Special attention is paid to the modelling of the fission channel near the fission barrier. |
