The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutroninduced interactions with the major actinides 235 U, 238 U and 239 Pu, on 241 Am and 23 Na, 59 Ni, Cr, Cu, Zr, Cd, Hf, W, Au, Pb and Bi are presented. It includes new fission yields, prompt fission neutron spectra and average number of neutrons per fission. In addition, new data for radioactive decay, thermal neutron scattering, gamma-ray emission, neutron activation, delayed neutrons and displacement damage are presented. JEFF-3.3 was complemented by files from the TENDL project. The libraries for photon, proton, deuteron, triton, helion and alpha-particle induced reactions are from TENDL-2017. The demands for uncertainty quantification in modeling led to many new covariance data for the evaluations. A comparison between results from model calculations using the JEFF-3.3 library and those from benchmark experiments for criticality, delayed neutron yields, shielding and decay heat, reveals that JEFF-3.3 performes very well for a wide range of nuclear technology applications, in particular nuclear energy.
The ORELA experiment on the neutron charge radius has been reevaluated. The neutron transmission of liquid thorogenic 208 Pb with the neutron time-of-flight method in the neutron energy range from 0.08 to 800 eV was measured. Additional studies on condensed matter effects for liquid Bi and liquid Pb have provided more accurate corrections resulting in smaller systematic uncertainties for the neutron-electron scattering length b ne. We have also reevaluated the transmission data on liquid Bi of Melkonian and co-workers. We have obtained values of b ne ϭ(Ϫ1.33Ϯ0.027Ϯ0.03)ϫ10 Ϫ3 fm for 208 Pb and b ne ϭ(Ϫ1.44Ϯ0.033Ϯ0.06)ϫ10 Ϫ3 fm for 209 Bi where for both results the two uncertainties denote the statistical and the systematic uncertainty, respectively. The results for 208 Pb and 209 Bi were found to be in good agreement. ͓S0556-2813͑97͒02610-1͔
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