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Title: Evaluation of the Neutron Data Standards

Abstract

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,α 1γ), 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 thermalmore » neutron constants. The data and covariance matrices of the uncertainties were obtained directly from the evaluation procedure.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [4];  [4];  [11];  [4];  [12];  [7];  [13];  [14];  [3];  [15] more »;  [14] « less
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  2. I Atomstandart, State Corporation Rosatom, Moscow (Russia)
  3. International Atomic Energy Agency, Vienna (Austria)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Tsinghua University, Beijing (China)
  6. Universidad de Santiago de Compostela (Spain)
  7. EC-JRC-Directorate G (Belgium)
  8. Japan Atomic Energy Agency, Nuclear Data Center, Ibaraki (Japan)
  9. Physikalisch-Technische Bundesanstalt, Braunschweig (Germany)
  10. International Atomic Energy Agency, Vienna (Austria) ; Uppsala University (Sweden)
  11. PRC/LEPh, CEA Cadarache (France)
  12. Karlsruhe Inst. of Technology (KIT) (Germany)
  13. Argonne National Lab. (ANL), Argonne, IL (United States)
  14. China Institute of Atomic Energy, Beijing (China)
  15. Univ. of Vienna (Austria); The Australian National University, Canberra (Australia)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1427382
Report Number(s):
LA-UR-17-30674
Journal ID: ISSN 0090-3752
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Data Sheets
Additional Journal Information:
Journal Volume: 148; Journal Issue: C; Journal ID: ISSN 0090-3752
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

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., and Wang, W. Evaluation of the Neutron Data Standards. United States: N. p., 2018. Web. doi:10.1016/j.nds.2018.02.002.
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. Evaluation of the Neutron Data Standards. United States. doi:10.1016/j.nds.2018.02.002.
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., and Wang, W. Thu . "Evaluation of the Neutron Data Standards". United States. doi:10.1016/j.nds.2018.02.002. https://www.osti.gov/servlets/purl/1427382.
@article{osti_1427382,
title = {Evaluation of the Neutron Data Standards},
author = {Carlson, A. D. and Pronyaev, V. G. and Capote, R. and Hale, G. M. and Chen, Z. -P. and Duran, I. and Hambsch, F. -J. and Kunieda, S. and Mannhart, W. and Marcinkevicius, B. and Nelson, R. O. and Neudecker, D. and Noguere, G. and Paris, M. and Simakov, S. P. and Schillebeeckx, P. and Smith, D. L. and Tao, X. and Trkov, A. and Wallner, A. and Wang, W.},
abstractNote = {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.},
doi = {10.1016/j.nds.2018.02.002},
journal = {Nuclear Data Sheets},
number = C,
volume = 148,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}

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