Evaluation of the Neutron Data Standards

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

doi:10.1016/j.nds.2018.02.002

Evaluation of the Neutron Data Standards

Journal Article · Thu Feb 01 00:00:00 EST 2018 · Nuclear Data Sheets

DOI:https://doi.org/10.1016/j.nds.2018.02.002· OSTI ID:1427382

Carlson, A. D. ^[1]; Pronyaev, V. G. ^[2]; Capote, R. ^[3]; Hale, G. M. ^[4]; Chen, Z. -P. ^[5]; Duran, I. ^[6]; Hambsch, F. -J. ^[7]; Kunieda, S. ^[8]; Mannhart, W. ^[9]; Marcinkevicius, B. ^[10]; Nelson, R. O. ^[4]; Neudecker, D. ^[4]; Noguere, G. ^[11]; Paris, M. ^[4]; Simakov, S. P. ^[12]; Schillebeeckx, P. ^[7]; Smith, D. L. ^[13]; Tao, X. ^[14]; Trkov, A. ^[3]; Wallner, A. ^[15] more »

National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
State Corporation Rosatom, Moscow (Russia)
International Atomic Energy Agency, Vienna (Austria)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Tsinghua Univ., Beijing (China)
Univ. de Santiago de Compostela (Spain)
EC-JRC-Directorate G, Geel (Belgium)
Japan Atomic Energy Agency, Ibaraki (Japan)
Physikalisch-Technische Bundesanstalt, Braunschweig (Germany)
International Atomic Energy Agency, Vienna (Austria); Uppsala Univ. (Sweden)
Alternative Energies and Atomic Energy Commission (CEA), Cadarache (France)
Karlsruhe Inst. of Technology (KIT), Eggenstein-Leopoldshafen (Germany)
Argonne National Lab. (ANL), Argonne, IL (United States)
China Inst. of Atomic Energy, Beijing (China)
Univ. of Vienna (Austria); Australian National Univ., Canberra, ACT (Australia)

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), ⁶Li(n,t), ¹⁰B(n,α), ¹⁰B(n,α₁γ), ^natC(n,n), Au(n,γ), ²³⁵U(n,f) and ²³⁸U(n,f). Also in the evaluation process the ²³⁸U(n,γ) and ²³⁹Pu(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,γ) cross section at 30 keV; reference cross sections for prompt γ-ray production in fast neutron-induced reactions; reference cross sections for very high energy fission cross sections; the ²⁵²Cf spontaneous fission neutron spectrum and the ²³⁵U 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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC52-06NA25396; SC0011527

OSTI ID:: 1427382

Alternate ID(s):: OSTI ID: 1615951

Report Number(s):: LA-UR--17-30674

Journal Information:: Nuclear Data Sheets, Journal Name: Nuclear Data Sheets Journal Issue: C Vol. 148; ISSN 0090-3752

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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