Improving nuclear data accuracy of 241Am and 237Np capture cross sections

G. Ž Erovnik (1) , P. Schillebeeckx (1) , D. Cano-Ott (2) , M. Jandel (3) , J.-I. Hori (4) , A. Kimura (5) , M. Rossbach (6) , A. Letourneau (7) , G. Noguere (8) , P. Leconte (8) , T. Sano (5) , Mark A. Kellett (9) , O. Iwamoto (5) , A.V. Ignatyuk (10) , O. Cabellos (11) , C. Genreith (12) , H. Harada (5)

1 JRC - European Commission - Joint Research Centre [Geel]
2 CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
3 LANL - Los Alamos National Laboratory
4 Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan
5 Japan Atomic Energy Agency
6 FZJ - Forschungszentrum Jülich GmbH | Centre de recherche de Jülich | Jülich Research Centre
7 DPHN - Département de Physique Nucléaire (ex SPhN)
8 DER - Département Etude des Réacteurs
9 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)
10 Institute of Physics and Power Engineering
11 OCDE - Organisation de Coopération et de Développement Economiques = Organisation for Economic Co-operation and Development
12 MLZ - Heinz Maier-Leibnitz Zentrum

In the framework of the OECD/NEA WPEC subgroup 41, ways to improve neutron induced capture cross sections for 241Am and 237Np are being sought. Decay data, energy dependent cross section data and neutron spectrum averaged data are important for that purpose and were investigated. New time-of-flight measurements were performed and analyzed, and considerable effort was put into development of methods for analysis of spectrum averaged data and re-analysis of existing experimental data.

Mots clés: neutron capture cross section; Am-241; Np-237; neutron spectrum; Decay data; time-of-flight measurement; spectrum analysis; metrology, radioactivity, ionizing radiation, Decay data measurement, nuclear instrumentation, instrumentation

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Analyse de données, Statistiques et Probabilités [physics.data-an]

G. Ž Erovnik, P. Schillebeeckx, D. Cano-Ott, M. Jandel, J.-I. Hori, et al.. Improving nuclear data accuracy of 241Am and 237Np capture cross sections. ND 2016: International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.11035, ⟨10.1051/epjconf/201714611035⟩. ⟨cea-01823482⟩