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Unrecognized Source...
Unrecognized Sources of Uncertainties (USU) in Experimental Nuclear Data
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- Capote, R. (författare)
- IAEA, NAPC Nucl Data Sect, A-1400 Vienna, Austria
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- Badikov, S. (författare)
- Rosatom State Corp, Atomstand, Moscow, Russia
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- Carlson, A. (författare)
- NIST, Gaithersburg, MD 20899 USA
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- Duran, I. (författare)
- Univ Santiago de Compostella, Santiago De Compostela 15782, La Coruna, Spain
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- Gunsing, F. (författare)
- Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France
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- Neudecker, D. (författare)
- Los Alamos Natl Lab, Los Alamos, NM 87545 USA
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- Pronyaev, V. G. (författare)
- IAEA, NAPC Nucl Data Sect, A-1400 Vienna, Austria
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- Schillebeeckx, P. (författare)
- Joint Res Ctr Geel, B-2440 Geel, Belgium
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- Schnabel, Georg (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Smith, D. L. (författare)
- Argonne Natl Lab, 1710 Ave Mundo,1506, Coronado, CA 92118 USA
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- Wallner, A. (författare)
- Australian Natl Univ, Canberra, ACT, Australia
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
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Ingår i: Nuclear Data Sheets. - : Elsevier BV. - 0090-3752 .- 1095-9904. ; 163, s. 191-227
- Relaterad länk:
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https://arxiv.org/pd...
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Evaluated nuclear data uncertainties reported in the literature or archived in data libraries are often perceived as unrealistic, most often because they are thought to be too small. The impact of this issue in applied nuclear science has been discussed widely in recent years. Commonly suggested causes are: poor estimates of specific error components, neglect of uncertainty correlations, and overlooked known error sources. However, instances have been reported where very careful, objective assessments of all known error sources have been made with realistic error magnitudes and correlations provided, yet the resulting evaluated uncertainties still appear to be inconsistent with observed scatter of predicted mean values. These discrepancies might be attributed to significant unrecognized sources of uncertainty (USU) that limit the accuracy to which these physical quantities can be determined.The objective of our work has been to develop qualitative and quantitative procedures for revealing and including USU estimates in nuclear data evaluations involving experimental input data. This paper identifies several specific clues that can be explored by evaluators in identifying the existence of USU. It then describes numerical procedures we have introduced to generate quantitative estimates of USU magnitudes. Key requirements for these procedures to be viable are that sufficient numbers of data points be available, for statistical reasons, and that additional supporting information about the measurements be provided by the experimenters. Several realistic examples are described here to illustrate these procedures and demonstrate their outcomes and limitations. Our work strongly supports the view that USU is an important issue in nuclear data evaluation, with significant consequences for applications, and that this topic warrants further investigation by the nuclear science community.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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Capote, R.
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Badikov, S.
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Carlson, A.
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Duran, I.
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Gunsing, F.
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Neudecker, D.
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Pronyaev, V. G.
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Schillebeeckx, P ...
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Schnabel, Georg
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Smith, D. L.
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Wallner, A.
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- NATURVETENSKAP
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Uppsala universitet