Abstract
Recent progress and future plan of the JENDL project are summarized. Two special purpose files were released recently. One is Photo-nuclear Data File 2016 (JENDL/PD-2016) which contains the data of photo-nuclear reaction cross sections covering a wide area of the nuclear chart. The other one is the JENDL Activation Cross Section File for Nuclear Decommissioning 2017 (JENDL/AD-2017) which provides production cross sections of radioactive nuclei by neutrons. A special purpose file JENDL/ImPACT-2018 dedicated to transmutation of long-lived fission products will be released in 2019. Regarding the general-purpose file, we are preparing to release the next version, which would be made available by 2022 as JENDL-5. Evaluation efforts on nuclides across wide range of nuclei form light to heavy have being made. The first test version JENDL-5α1 was created in 2018. The evaluated data will be updated on the basis of benchmark tests on reactor criticalities and neutron shieldings.
Highlights
More than 40 years have passed since the first version of Japanese Evaluated Nuclear Data Library (JENDL) was released in 1977
While some deviations are seen for JENDL-4.0 evaluation, the present results show good consistency with all measured data
Version of general purpose file JENDL-5 is under development
Summary
More than 40 years have passed since the first version of Japanese Evaluated Nuclear Data Library (JENDL) was released in 1977. Isomer production cross sections, which is not usually included in the general purpose file, are important in the case of the activation file They were consistently evaluated with the other cross sections by optimizing the model parameters so as to reproduce experimental data in high energy regions where the nuclear reaction model code was applied to the evaluations. This new level density was developed by parameterizing in a hybrid way of spherical and deformed nuclei and their deformation properties were taken from microscopic theoretical calculations.[13] New experimental data of LLFPs obtained at the RIKEN RIBF facility using inverse kinematics were applied to the optimization of the parameter in preequilibrium exciton model It gave significant improvement in the agreements with the experimental data of production cross sections over the wide range of produced isotopes.
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