Speaker
Description
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. Knowledge of accurate neutron-induced fission cross sections is crucially important for the design of various reactor systems. Therefore, accurate nuclear data for neutron-induced reactions on Am 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+239,240,241,242,242m,243,244Am reactions are consistently calculated and analyzed by theoretical nuclear models in the energy range of En≤200 MeV. The corresponding models include the optical model, the unified Hauser-Feshbach theory and the exciton model, the improved Iwamoto-Harada 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.