Calculation of Neutron Cross Sections on ^<93>Nb for JENDL-4

概要

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Nuclear data of 93Nb in the Japanese Evaluated Nuclear Data Library JENDL-3.3 were reexamined in the incident neutron energy range from 10 keV to 20 MeV toward JENDL-4. Cross sections, differential and double-differential cross sections were calculated on the basis of nuclear reaction models such as the spherical optical model, the distorted wave Born approximation, the Kalbach preequilibrium model, and the Hauser-Feshbach statistical model. It was found that experimental neutron emission spectra were reproduced well by the present calculation compared with the JENDL-3.3 evaluations for emission energies >1 MeV. Also, calculated cross sections were almost consistent with the available experimental data for total, elastic and inelastic scattering, (n,γ), (n,3n), (n,Xp), (n,Xd), (n,t), (n,α), (n,nα), and (n,Xα) reactions. An appreciable change from the JENDL-3.3 evaluation was not seen for the (n,2n) cross section, which was about 20 percent larger than the experiments for incident energies ≤14 MeV.
社団法人日本原子力学会の論文
2008-08-01