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Published on: January 30, 2020
Measurement of the absolute gamma-ray emission intensities from the decay of 103Pd
J Riffaud1, M-C Lépy1, P Cassette1
1CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC 111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France.
Abstract:
Palladium-103 decays through electron capture to excited levels of 103Rh, and especially to the 39.748-keV metastable state. A high activity palladium chloride solution was standardized by liquid scintillation, using the Triple-to-Double Coincidence Ratio method. The absolute photon emission intensities were determined by gamma-ray spectrometry using point sources prepared with the standard solution. Different detectors and measuring conditions were used to cross-reference the results. The most intense photon emission intensities are derived with about 1% relative combined standard uncertainty.
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