Measurement of the absolute gamma-ray emission intensities from the decay of 103Pd

J Riffaud; M-C Lépy; P Cassette; M Corbel; M A Kellett; V Lourenço

doi:10.1016/j.apradiso.2020.109298

Measurement of the absolute gamma-ray emission intensities from the decay of 103Pd

Appl Radiat Isot. 2021 Jan:167:109298. doi: 10.1016/j.apradiso.2020.109298. Epub 2020 Sep 20.

Authors

J Riffaud¹, M-C Lépy², P Cassette¹, M Corbel¹, M A Kellett¹, V Lourenço¹

Affiliations

¹ CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC 111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France.
² CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât. 602 PC 111, CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France. Electronic address: marie-christine.lepy@cea.fr.

PMID: 33010791
DOI: 10.1016/j.apradiso.2020.109298

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.

Keywords: (103)Pd; Gamma-ray spectrometry; Half-life; Liquid scintillation counting; Photon emission intensities; TDCR.