1. International key comparison of neutron fluence measurements in monoenergetic neutron fields - CCRI(III)-K11
- Author
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Gressier, V., Bonaldi, A. C., Dewey, M. S., Gilliam, D. M., Harano, H., Masuda, A., Matsumoto, T., Moiseev, N., Jeffrey Nico, Nolte, R., Oberstedt, S., Roberts, N. J., Röttger, S., Thomas, D. J., Institut de Radioprotection et de Sûreté Nucléaire (IRSN), JRC Institute for Reference Materials and Measurements [Geel] (IRMM), European Commission - Joint Research Centre [Geel] (JRC), National Institute of Standards and Technology [Gaithersburg] (NIST), National Metrology Institute of Japan, National Institute od Advanced Industrial Science and Technology, Physikalisch-Technische Bundesanstalt [Braunschweig] (PTB), and National Physical Laboratory [Teddington] (NPL)
- Subjects
Ionizing radiation ,Key comparison reference values ,Neutrons ,[PHYS]Physics [physics] ,General Engineering ,Mono-energetic neutrons ,Degree of equivalence ,01 natural sciences ,010305 fluids & plasmas ,National standard ,National metrology institutes ,0103 physical sciences ,Weighted mean values ,Units of measurement ,010306 general physics ,Reference instruments ,International comparison - Abstract
To ensure the validity of their national standards, National Metrology Institutes, NMIs, participate regularly in international comparisons. In the area of neutron metrology, Section III of the Consultative Committee for Ionizing Radiation is in charge of the organization of these comparisons. From September 2011 to October 2012, the eleventh key comparison, named CCRI(III)-K11, took place at the AMANDE facility of the LNE-IRSN, in France. Participants from nine NMIs came with their own primary reference instruments, or instruments traceable to primary standards, with the aim of determining the neutron fluence, at 1 m distance from the target in vacuum, per monitor count at four monoenergetic neutron fields: 27 keV, 565 keV, 2.5 MeV and 17 MeV. The key comparison reference values (KCRV) were evaluated as the weighted mean values of the results provided by seven participants. The uncertainties of each KCRV are between 0.9 % and 1.7 %. The degree of equivalence (DoE), defined as the deviation of the result reported by the laboratories for each energy from the corresponding KCRV, and the associated expanded uncertainty are also reported and discussed.
- Published
- 2014
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