Defining “k f-factors” for threshold reactions

Journal Article (2023)
Author(s)

R. van Sluijs (k0-Ware, Heerlen)

M. Blaauw (TU Delft - RID/KEWO/Kwaliteitszorg-IMS)

Support unit
RID/KEWO/Kwaliteitszorg-IMS
Copyright
© 2023 R. van Sluijs, Menno Blaauw
DOI related publication
https://doi.org/10.1007/s10967-023-08871-y
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 R. van Sluijs, Menno Blaauw
Support unit
RID/KEWO/Kwaliteitszorg-IMS
Issue number
6
Volume number
332
Pages (from-to)
1835-1840
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Abstract

The k0-method (De Corte in The k0-standardization method: move to the optimization of neutron activation analysis. Habil. Thesis, Ghent University, Belgium, 1987) was developed solely for the use of (n, γ) nuclear reactions in neutron activation analysis. For this, a definition of only the thermal and epi-thermal flux was needed. The fast flux of the fission neutrons was not taken into account although it was considered for primary interferences by De Corte0. The energy distribution of the fission neutrons can be rather well described by a Watt distribution but is reactor dependent. To complicate things, the activation cross-section behaviour is nuclide dependent. In order to incorporate threshold reactions in the k0-method we propose to use predefined kf-factors, measuring the fast flux using a Ni-58 monitor, and to introduce an h-factor that accounts for all deviations for a specific reaction and irradiation facility. It is shown, based on data from Verheijke, that there are useful correlations for Ni-58, Ti-47 and Ti-48. Activation cross section functions indicate that there are possible more relations that might allow h-factors to be predicted.

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