Nedjadi Youcef, Juget Frédéric, Desorgher Laurent, Durán M Teresa, Bochud François, Müller Cristina, Talip Zeynep, van der Meulen Nicholas P, Bailat Claude
Institut de Radiophysique, Lausanne, Switzerland.
Institut de Radiophysique, Lausanne, Switzerland.
Appl Radiat Isot. 2020 Dec;166:109411. doi: 10.1016/j.apradiso.2020.109411. Epub 2020 Sep 10.
Tb, which emits low-energy β- and γ-particles in addition to conversion and Auger electrons, has aroused increased interest for medical imaging and therapy. To support the use of this radionuclide, aTb solution was standardised using the β-γ coincidence technique, as well as the TDCR method. The solution had 4.5·10% of Tb impurities. Primary coincidence measurements, with plastic or liquid scintillators for beta detection, were carried out using both analogue and digital electronics. TDCR measurements using defocusing, grey filtering and quenching for varying the efficiency were also made. Monte Carlo calculations were used to compute the detection efficiency. The coincidence measurements with analogue electronics and the TDCR show a good consistency, and are compatible with the digital coincidence results within uncertainties. An ampoule of this solution was submitted to the BIPM as a contribution to the international reference system.
