Standardisation of 241Am activity for a key comparison
The JRC applied six measurement techniques to standardise the activity of an 241Am solution in the frame of the 2003 key comparison CCRI(II)-K2.Am-241. The methods used were alpha-particle counting at a defined small solid angle, high-efficiency particle and photon counting with a windowless 4pi CsI(Tl) sandwich spectrometer, 4pi alpha counting with a pressurised proportional counter, alpha-gamma coincidence counting and sum counting with a small pressurised proportional counter and a NaI(Tl) well detector, and 4pi counting with a liquid scintillation counter. All results were consistent and an unusually low measurement uncertainty of 0.054% was achieved. An overview is presented of the outcome of the key comparison exercise, which demonstrates international equivalence.
POMME Stefaan;
ALTZITZOGLOU Timotheos;
VAN AMMEL Raf;
SIBBENS Goedele;
2021-11-16
SPRINGER
JRC125951
0236-5731 (online),
https://link.springer.com/article/10.1007/s10967-021-07969-5,
https://publications.jrc.ec.europa.eu/repository/handle/JRC125951,
10.1007/s10967-021-07969-5 (online),
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