“…The response of such instruments i.e., the measured ionization current (which is related to the total energy deposited in the IC gas volume), depends on the chamber design (wall thickness, nature and pressure of the filling gas), the nature and dimensions of the source (type of vial or ampoule, filling height of radioactive sample, etc. ), and the shielding around (Ceccatelli et al, 2007;Kryeziu et al, 2007;Thiam et al, 2016). Generally, ICs are well adapted for solutions of gamma-emitting radionuclides (Amiot et al, 2012;Zimmerman and Judge, 2007) but can also be used for high-energy beta-emitting radionuclides such as 90 Y, although such measurements are more challenging (Pearce et al, 2007;Fenwick et al, 2014).…”