Abstract
The objective of this work is for the verification of large experimental (EXFOR) and evaluated nuclear reaction databases (JEFF, ENDF, JENDL, TENDL…). The work is applied to neutron reactions in EXFOR data, including threshold reactions, isomeric transitions, angular distributions and data in the resonance region of both isotopes and natural elements. Finally, a comparison of the resonance integrals compiled in EXFOR database with those derived from the evaluated libraries is also performed.
Highlights
The Nuclear Energy Agency (NEA) Data Bank gathers and updates the data from different organisms for all nuclear reactions, and makes them available to scientists and engineers
The NEA Data Bank and the Societede Calcul Mathematique co-developed statistical methods to cross-check the consistency between experimental (EXFOR) and evaluated libraries (ENDF/B-VII.1 (USA), JEFF-3.2 (OECD/NEA), JENDL-4.0 (Japan), TENDL2014 (Netherlands))
The proportion of potential outliers might seem high, but the method is based on uncertainties, so a point can receive a bad ranking when the uncertainties of both ENDF and EXFOR are very small with respect to the distance, and this situation is very frequent
Summary
The Nuclear Energy Agency (NEA) Data Bank gathers and updates the data from different organisms for all nuclear reactions, and makes them available to scientists and engineers. The NEA Data Bank and the Societede Calcul Mathematique co-developed statistical methods to cross-check the consistency between experimental (EXFOR) and evaluated libraries (ENDF/B-VII. (USA), JEFF-3.2 (OECD/NEA), JENDL-4.0 (Japan), TENDL2014 (Netherlands)). In the present work we update this method to give a consistency ranking to each EXFOR entry that can be compared across all the reactions. The ranking allows directly seeing which EXFOR data and which reactions are the most suspicious, and which are reliable. This cross-checking allows reporting the suspicious EXFOR subentries, but it helps identifying flaws in evaluated data files
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