EPJ Nuclear Sci. Technol.
Volume 9, 2023
Templates of Expected Measurement Uncertainties: a CSEWG Effort
|Number of page(s)||10|
|Published online||10 November 2023|
Templates of expected measurement uncertainties
Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
2 Naval Nuclear Laboratory, Schenectady, NY, 12301-1072, USA
3 University of California Berkeley, Berkeley, CA, 94720, USA
4 U.S. Naval Academy, Annapolis, MD, 21402, USA
5 Argonne National Laboratory, Lemont, IL, 60439-4842, USA (retired)
6 Lancaster University, Lancaster, LA1 4YW, UK
7 National Institute of Standards and Technology, Gaithersburg, MD, 20899-8463, USA
8 Pacific Northwest National Laboratory, Richland, WA, 99352, USA
9 Helmholtz Centre Dresden Rossendorf, 01328 Dresden, Germany
10 Uppsala University, 75120 Uppsala, Sweden
11 Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
12 International Atomic Energy Agency, A-1400 Vienna, Austria
13 University of Vienna, A-1010 Vienna, Austria
14 Duke University, Durham, NC, 27708-0308, USA
15 Triangle Universities Nuclear Laboratory, Durham, NC, 27708-0308, USA
16 CEA, DAM, DIF, F-91297 Arpajon, France
17 Univ. Bordeaux, LP2I, UMR5797, CNRS, F-33170 Gradignan, France
18 Brookhaven National Laboratory, Upton, NY, 11973-5000, USA
19 Lawrence Livermore National Laboratory, Livermore, CA, 94551-0808, USA
20 The University of Tennessee Knoxville, Knoxville, Tennessee, 37996, USA
21 Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, France
* e-mail: firstname.lastname@example.org
Received in final form: 19 July 2023
Accepted: 7 August 2023
Published online: 10 November 2023
The covariance committee of CSEWG (Cross Section Evaluation Working Group) established templates of expected measurement uncertainties for neutron-induced total, (n,γ), neutron-induced charged-particle, and (n,xn) reaction cross sections as well as prompt fission neutron spectra, average prompt and total fission neutron multiplicities, and fission yields. Templates provide a list of what uncertainty sources are expected for each measurement type and observable, and suggest typical ranges of these uncertainties and correlations based on a survey of experimental data, associated literature, and feedback from experimenters. Information needed to faithfully include the experimental data in the nuclear-data evaluation process is also provided. These templates could assist (a) experimenters and EXFOR compilers in delivering more complete uncertainties and measurement information relevant for evaluations of new experimental data, and (b) evaluators in achieving a more comprehensive uncertainty quantification for evaluation purposes. This effort might ultimately lead to more realistic evaluated covariances for nuclear-data applications. In this topical issue, we cover the templates coming out of this CSEWG effort–typically, one observable per paper. This paper here prefaces this topical issue by introducing the concept and mathematical framework of templates, discussing potential use cases, and giving an example of how they can be applied (estimating missing experimental uncertainties of 235U(n,f) average prompt fission neutron multiplicities), and their impact on nuclear-data evaluations.
© D. Neudecker et al., Published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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