Speaker
Description
Abstract
In order to reduce the uncertainties in the design and operation of accelerator-driven systems (ADSs), high-precision nuclear data for neutron- and proton-induced reactions on a variety of isotopes in the energy range below 200 MeV are necessary. As the important component of the spent fuel of current nuclear power plants, U isotopes will be loaded into ADSs to produce energy and neutrons. Therefore, accurate nuclear data for neutron-induced reactions on U isotopes are needed in the calculation of neutron and energy balance and the prediction of transmutation rates of the various radioactive species. To meet this requirement, all cross sections, angular distributions, energy spectra, double differential cross sections of neutron, proton, deuteron, triton, helium-3 and alpha emissions and the number of neutron per fission for n+232,234,236,237U reactions are consistently calculated and analyzed by theoretical nuclear models in the energy range of En≤200 MeV. The optical model, the unified Hauser-Feshbach theory and the exciton model, the evaporation models, the linear angular momentum dependent exciton state density model, the fission model, the intranuclear cascade model, the distorted-wave Born approximation and the coupled channel theory. The calculated results reproduce the experimental data well, and the variation tendency of reaction cross sections related to the target mass numbers is obtained.