Fast digital 4πβ−4πγ coincidence counting with offline analysis at IRA

To demonstrate and validate the capacity of this system to standardize the activity of radioisotopes, we compare its predictions for the activity concentration of 133Ba, 166 mHo and 18F solutions with the results from a coincidence counting system with analog electronics, as well as with the results from other primary methods and a secondary measurement performed with an IG11 ionization chamber (CIR, chambre d′ionization de référence) with an equivalent activity traceable to the Système International de Référence.