Uncertainty analyses of neutron cross sections for Nitrogen-15, Lead-206,207,208, Bismuth-209, Plutonium-238, Americium-242m, and Curium-244 in JENDL-3.3

Shibata, Keiichi; Nakagawa, Tsuneo

Covariances of neutron cross sections for N, Pb, Bi, Pu, Am and Cm contained in JENDL-3.3 have been evaluated for the design of accelerator-driven transmutation systems. The covariances were obtained from the experimental data and model calculations on which the JENDL-3.3 data were based. The physical quantities for which covariances were deduced are the elastic scattering cross section of N, the inelastic scattering cross sections of Pb and Bi, and the fission and capture cross sections of Pu, Am and Cm. Uncertainties in the resolved resonance parameters were estimated for Pu, Am and Cm. The results were compiled in the ENDF-6 format and merged with the JENDL-3.3 data.