International inter-comparison exercise on \({}^{153}\hbox {Sm}\)

Abstract

Samarium-153 (\({}^{153}\hbox {Sm}\)) is a short-lived radionuclide that decays to stable europium-153 via beta emission, with subsequent de-excitation via gamma emission and internal conversion. Historical measurements of \({}^{153}\hbox {Sm}\) by gamma spectrometry and beta liquid scintillation counting have shown a low bias compared to beta proportional counting. In order to investigate this, four national laboratories jointly conducted an experimental inter-comparison exercise on a certified \({}^{153}\hbox {Sm}\) sample, created from neutron activation of samarium-152. Radiometric measurements were conducted using gamma spectrometry, liquid scintillation counting, gas proportional counting, and passivated implanted planar silicon detectors and compared across the four institutions against the certified value. The results from this experiment are presented together with a number of conclusions which suggest that the current published cumulative fission yield for \({}^{153}\hbox {Sm}\), as used by many laboratories, is approximately 15% high and is the likely cause of the previously observed bias.

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Change history

  • 11 December 2019

    In the original publication of the article, eighteenth author���s name was misspelt. The correct name is given in this correction.

  • 11 December 2019

    In the original publication of the article, eighteenth author���s name was misspelt. The correct name is given in this correction.

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Acknowledgements

The authors would like to thank NPL for sourcing, certifying and distributing the \({}^{153}\hbox {Sm}\) solution measured by the participants of this inter-comparison exercise.

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Correspondence to M. J. Jackson.

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Jackson, M.J., Gilligan, C., Davies, A.V. et al. International inter-comparison exercise on \({}^{153}\hbox {Sm}\). J Radioanal Nucl Chem 318, 107–115 (2018). https://doi.org/10.1007/s10967-018-6048-1

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Keywords

  • Samarium-153
  • Inter-comparison
  • Fission product yield
  • Gamma spectrometry
  • Liquid scintillation counting
  • Gas proportional counting