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Effect of gamma window setting on activity measurement of 134Cs by 4πβ(LS)-γ coincidence method

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Abstract

The complex decay scheme of 134Cs allows the activity measurement of the nuclide by the 4πβ(LS)-γ coincidence method to be performed at different γ-window settings. This paper describes the activity measurement of 134Cs by 4πβ (LS)-γ coincidence method based on five γ-window settings. The use of different γ-window settings affects the efficiency curve used to determine the activity value. The possible sources that are affecting the efficiency function are discussed. Despite the different efficiency functions obtained from the five γ-windows, a linear extrapolation can be performed by limiting the fitting range within the highest efficiency range. The results show that the specific activity value of each setting is differed by less than 0.3%, with the mean activity value of (1145.6 ± 4.4) kBq/g at the reference time. The quoted uncertainty is evaluated at k = 1.

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Acknowledgements

The authors would like to thank the Korea Research Institute of Standards and Science (KRISS) for supporting this research activity.

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Authors and Affiliations

  1. Department of Science of Measurement, University of Science and Technology (UST), 217 Gajeong-ro Yuseong-gu, Daejeon, 34113, Korea

    Agung Agusbudiman, Kyoung Beom Lee & Jong Man Lee

  2. Ionizing Radiation Metrology Group, Korea Research Institutes of Standards and Science (KRISS), 267 Gajeong-ro Yuseong-gu, Daejeon, 34113, Korea

    Agung Agusbudiman, Kyoung Beom Lee, Jong Man Lee, Sang Hoon Hwang & Dong Hye Heo

  3. Radiation Metrology Division, National Nuclear Energy Agency (BATAN), Lebak Bulus Raya No.49, DKI Jakarta, 12440, Indonesia

    Agung Agusbudiman

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  1. Agung Agusbudiman
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  2. Kyoung Beom Lee
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Correspondence to Kyoung Beom Lee.

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Agusbudiman, A., Lee, K.B., Lee, J.M. et al. Effect of gamma window setting on activity measurement of 134Cs by 4πβ(LS)-γ coincidence method. J Radioanal Nucl Chem 330, 539–545 (2021). https://doi.org/10.1007/s10967-021-07803-y

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  • DOI: https://doi.org/10.1007/s10967-021-07803-y

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