Tracer method for pure beta emitter measurement

Calculation of extrapolation curves in the 4π(LS)β-γ coincidence technique with the Monte Carlo code Geant4

“…For instance the efficiencytracing technique can be applied for the standardization of 137 Cs using 134 Cs as a  emitter tracer by mixing both radionuclides in the same radioactive source. In order to improve the chemical mixture, efficiency-tracing measurements can be carried out with LS sources as an alternative to classical dry sources (Steyn, 1973). This method relies on the efficiencyextrapolation technique using coincidences measured with the  emitter.…”

“…The influence of Cerenkov light contributing to the efficiency in the -channel and its variation is highlighted with efficiency-extrapolation measurements of 54 Mn. Finally, the problem of the non-linearity between -inefficiencies is illustrated in the case of the efficiency-tracing technique for the activity measurements of 14 C using 60 Co as a tracer (Steyn, 1973).…”

Primary standardization of activity using the coincidence method based on analogue instrumentation

“…As a consequence, a correction has to be applied to the activity value given by the efficiency extrapolation method [32][33][34]. This case is similar to the efficiency tracing method when the coincidence method is extended to the standardization of pure β-emitters or pure electron capture [35][36][37][38]. In short, when the extrapolation method is applied to a mixture of weighed aliquots of two radioactive solutions (β-γ emitter and pure β-emitter), it is possible to extract the activity of the pure β-emitter.…”