Absolute intensities of the γ-ray emissions originating from the electron capture decay of 153Gd
1 National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
2 Department of Physics, University of Surrey, Guildford GU2 7XH, UK
3 Grenoble Institute of Technology, 38016 Grenoble Cedex 1, France
a e-mail: Robert.firstname.lastname@example.org
Published online: 13 September 2017
153Gd has widespread use, in non-destructive testing, as a line source in SPECT imaging and has been recently proposed as an in-vitro interstitial rotating shield brachytherapy (I-RSBT) source. In this work, the six most intense emissions in the de-excitation of the daughter nucleus 153Eu have been measured, with an improved accuracy and precision to γ-ray emission intensities reported previously, via two characterised HPGe spectrometers. A specific absolute activity of 512.5 (25) kBq g−1 was determined using the 4π (LS)-γ digital coincidence counting technique. This absolute activity was used to determine an absolute intensity for the 97.4 keV γ-ray emission of 30.15 (20) per 100 decays. The reported absolute emission intensity of this transition in this work has a relative difference of 4% from the currently recommended value.
© The Authors, published by EDP Sciences, 2017
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