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Primary activity standardization of 18F for the calibration of the KRISS ionization chamber

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Abstract

A primary activity standardization of 18F was carried out at KRISS by means of the 4πβ(LS)-γ coincidence counting with a combined standard uncertainty of 0.31%. The activity value was compared with those obtained from the TDCR method, which was performed as a confirmatory measurement of the standardization. The final massic activity value of (13.186 ± 0.041) MBq·g‑1 at k = 1 was found and used as the reference value to calibrate the KRISS reference ionization chamber employed as the secondary measurement standard of 18F. The calibration result was then compared with the existing calibration factor that was obtained from the efficiency curve of the reference ionization chamber.

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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. This study was presented at the International Conference on Nuclear Analytical Techniques in 2022 (NAT2022), which was held in Daejeon, Korea, from Dec. 7 to 9, 2022.

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Contributions

AA: Conceptualization, Methodology, Investigation, Software, Formal analysis, Data curation, Visualization, Writing – Original Draft, Writing – Review & Editing. KBL: Conceptualization, Methodology, Software, Formal analysis, Validation, Supervision, Writing – Review & Editing, Funding acquisition. JML: Investigation, Data curation, Validation, Writing – Review & Editing. SH: Project administration, Supervision, Funding acquisition, Validation, Writing – Review & Editing. BCK: Investigation, Resources. DHH: Resources.

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Correspondence to Kyoung Beom Lee.

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Agusbudiman, A., Lee, K.B., Lee, J.M. et al. Primary activity standardization of 18F for the calibration of the KRISS ionization chamber. J Radioanal Nucl Chem 332, 5259–5265 (2023). https://doi.org/10.1007/s10967-023-09099-6

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