Evaluation of the Neutron Data Standards

Autor(en)

A. D. Carlson, V. G. Pronyaev, R. Capote, G. M. Hale, Z. -P. Chen, I. Duran, F. -J. Hambsch, S. Kunieda, W. Mannhart, B. Marcinkevicius, R. O. Nelson, D. Neudecker, G. Noguere, M. Paris, S. P. Simakov, P. Schillebeeckx, D. L. Smith, X. Tao, A. Trkov, A. Wallner, W. Wang

Abstrakt

With the need for improving existing nuclear data evaluations, (e.g., ENDF/B-VIII.0 and JEFF-3.3 releases) the first step was to evaluate the standards for use in such a library. This new standards evaluation made use of improved experimental data and some developments in the methodology of analysis and evaluation. In addition to the work on the traditional standards, this work produced the extension of some energy ranges and includes new reactions that are called reference cross sections. Since the effort extends beyond the traditional standards, it is called the neutron data standards evaluation. This international effort has produced new evaluations of the following cross section standards: the H(n,n), Li-6(n,t), B-10(n, alpha), B-10(n,alpha(1)gamma), C-nat(n,n), Au(n,gamma), U-235(n,f) and U-238(n,f). Also in the evaluation process the U-238(n,gamma) and Pu-239(n,f) cross sections that are not standards were evaluated. Evaluations were also obtained for data that are not traditional standards: the Maxwellian spectrum averaged cross section for the Au(n,gamma) cross section at 30 keV; reference cross sections for prompt gamma-ray production in fast neutron-induced reactions; reference cross sections for very high energy fission cross sections; the Cf-252 spontaneous fission neutron spectrum and the U-235 prompt fission neutron spectrum induced by thermal incident neutrons; and the thermal neutron constants. The data and covariance matrices of the uncertainties were obtained directly from the evaluation procedure.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

National Institute of Standards & Technology (NIST), State Atomic Energy Corporation Rosatom, International Atomic Energy Agency (IAEA), Los Alamos National Laboratory, Tsinghua University, Universidade de Santiago de Compostela (USC), EC JRC Directorate G, Japan Atomic Energy Agency, Physikalisch-Technische Bundesanstalt (PTB), Uppsala University, CEA Cadarache, Karlsruher Institut für Technologie, Argonne National Laboratory, China Institute of Atomic Energy (CIAE), Australian National University

Journal

Nuclear Data Sheets

Band

148

Seiten

143-188

Anzahl der Seiten

46

ISSN

0090-3752

DOI

https://doi.org/10.1016/j.nds.2018.02.002

Publikationsdatum

02-2018

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/evaluation-of-the-neutron-data-standards(715a41ed-2ece-4687-aeaa-ea888f3e1f69).html