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Measurement of k0 values for europium, lutetium and iridium at FRM II with a very well thermalized neutron spectrum

Xiaosong Li, Robbert van Sluijs, Gregory Garth Kennedy

Article (2021)

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Abstract

The k0 values of 6 non-1/v nuclides (152Eu, 152mEu, 154Eu, 177Lu, 192Ir and 194Ir) were determined using the extended Høgdahl formalism at the research reactor FRM II with very high f values. Standards were irradiated in 4 channels at different local temperatures between 40 °C and 55 °C measured using temperature sensitive irreversible labels. A good agreement with the recommended values was found for 152Eu, 154Eu and 177Lu using the original g(Tn) factors by Gryntakis, however, the k0 values for 152mEu in this work were 7% higher. New k0 values were also determined using the g(Tn) factors by Van Sluijs. Differences up to 6% were found for Eu isotopes compared with the recommended values. The recommended k0 values for 192Ir and 194Ir could be confirmed using g = 1. The theoretical k0 values for 177Lu were calculated using new nuclear data. They are up to 6% less than the recommended values. The present k0 values determined in this work showed a similar trend. The influence of different g(Tn) factors on the determination of the k0 values was investigated.

Uncontrolled Keywords

k0 values, k0 NAA, g factors, Non-1/v nuclides, Westcott convention, Extended høgdahl formalism, Neutron temperature, Neutron activation analysis

Subjects: 3100 Physics > 3100 Physics
3100 Physics > 3101 Atomic and molecular studies
3100 Physics > 3104 Particle physics
Department: Department of Engineering Physics
Funders: Projekt DEAL
PolyPublie URL: https://publications.polymtl.ca/9259/
Journal Title: Journal of Radioanalytical and Nuclear Chemistry (vol. 327, no. 1)
Publisher: Springer Nature
DOI: 10.1007/s10967-020-07500-2
Official URL: https://doi.org/10.1007/s10967-020-07500-2
Date Deposited: 24 Mar 2022 11:27
Last Modified: 11 Nov 2022 14:17
Cite in APA 7: Li, X., van Sluijs, R., & Kennedy, G. G. (2021). Measurement of k0 values for europium, lutetium and iridium at FRM II with a very well thermalized neutron spectrum. Journal of Radioanalytical and Nuclear Chemistry, 327(1), 533-542. https://doi.org/10.1007/s10967-020-07500-2

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