US EPA

521185 

Journal Article 

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, K; Nakagawa, T 

2007 

Yes 

Journal of Nuclear Science and Technology
ISSN: 0022-3131 

44 

1 

1-9 

English 

Covariances of neutron cross sections for N-15, Pb-206,Pb-207,Pb-208, Bi-209, Pu-238, Am-242m and Cm-244 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-15, the inelastic scattering cross sections of Ph-206,Ph-207,Ph-208 and Bi-209, and the fission and capture cross sections of Pu-238, Am-242m and Cm-244. Uncertainties in the resolved resonance parameters were estimated for Pu-238, (242)mAm and Cm-244. The results were compiled in the ENDF-6 format and merged with the JENDL-3.3 data. 

JENDL-3.3; covariance; cross section; resonance parameter; nitrogen-15; lead-206,207,208; bismuth-209; plutonium-238; americium-242m; curium-244; elastic scattering; high-resolution; energy-levels; nuclear-data; fission; am-242m; cm-246; plutonium-238; fragments; protons