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Measurement of absolute γ-ray emission probabilities in the decay of 227Ac in equilibrium with its progeny

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 discs by drop deposition of a solution with 227Ac in radioactive equilibrium with its...

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Published in:Applied radiation and isotopes 2019-02, Vol.144, p.34-46
Main Authors: Marouli, M., Lutter, G., Pommé, S., Van Ammel, R., Hult, M., Pierre, S., Dryák, P., Carconi, P., Fazio, A., Bruchertseifer, F., Morgenstern, A.
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container_title Applied radiation and isotopes
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creator Marouli, M.
Lutter, G.
Pommé, S.
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Dryák, P.
Carconi, P.
Fazio, A.
Bruchertseifer, F.
Morgenstern, A.
description 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 discs 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-ray emission probabilities are proposed. •Measured gamma-ray emission probabilities in 227Ac decay series.•Mean values taken from 4 laboratories.•Source activity determined by primary standardisation.•Results reported for 87 γ-ray lines.•Generally in good agreement with literature values.
doi_str_mv 10.1016/j.apradiso.2018.08.023
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subjects 223Ra
227Ac
227Th
Decay data
γ-ray intensities
γ-ray spectrometry
title Measurement of absolute γ-ray emission probabilities in the decay of 227Ac in equilibrium with its progeny
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