Evaluation of neutron nuclear data on tellurium isotopes |
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Authors: | Keiichi Shibata |
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Affiliation: | 1. Nuclear Data Center, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japanshibata.keiichi@jaea.go.jp |
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Abstract: | Neutron nuclear data on 13 Te isotopes have been evaluated for the next release of Japanese Evaluated Nuclear Data Library (JENDL) general purpose file in the energy region from 10? 5 eV to 20 MeV. Thermal capture cross sections of 120, 121m, 127m, 129m, 131m, 132Te were determined from the latest measurements or from a simplified formula, although the resolved resonance parameters, which describe the low-energy behavior of cross sections, remain unchanged from JENDL-4.0 for 122, 123, 124, 125, 126, 128, 130Te. A statistical model code was applied to evaluate the cross sections above the resolved resonance region. Coupled-channel optical model parameters were employed for the interaction between neutrons and nuclei. Compound, pre-equilibrium, and direct-reaction processes were considered for cross-section calculation in high-energy region. The present results reproduce experimental data very well, and are found to be much better than the JENDL-4.0 data. The evaluated data are compiled into evaluated nuclear data file (ENDF)-formatted data files. |
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Keywords: | neutron nuclear data evaluation tellurium isotopes cross section JENDL optical model statistical model |
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