The emission probabilities of γ-rays produced in the 227Ac decay series were determined by high-resolution γ-ray spectrometry of sources with standardised activity. The sources were prepared quantitatively on glass disks by drop deposition of a solution with 227Ac in radioactive equilibrium with its daughter nuclides. Their activity was measured by a primary standardisation technique based on alpha-particle counting at a defined low solid angle. Four laboratories performed γ-ray spectrometry and derived absolute γ-ray intensities. Mean values were calculated and compared with literature data and the currently recommended evaluated data. New values on certain γ-emission probabilities are proposed.
MAROULI Maria;
LUTTER Guillaume;
POMME Stefaan;
VAN AMMEL Raf;
HULT Mikael;
PIERRE S.;
DRYAK P.;
CARCONI P.;
FAZIO A.;
BRUCHERTSEIFER Frank;
MORGENSTERN Alfred;
2018-12-17
PERGAMON-ELSEVIER SCIENCE LTD
JRC111568
0969-8043 (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC111568,
10.1016/j.apradiso.2018.08.023 (online),
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