The influence of different source compositions and α-particle energies on the detection efficiency of a gas-flow proportional counter was examined using experimental measurements and Monte Carlo simulations. Efficiency variation with alpha-particle energy was very marked, being less significant with the substrate composition. These results show that the determination of gross alpha activity in an unknown sample must be carried out very carefully in order to give a correct estimation of its activity.
Applied Radiation and Isotopes
Alfonso Fernández Timón is Associate Professor and one of the senior researchers of the Optimization Algorithms Research Group GRAFO at the Universidad Rey Juan Carlos. Previously he was a fellow of the Metrological Stations Network and of the Radiological Surveillance Plan of the CSN at the University of Extremadura. His research interests range from the application of metaheuristics to solve combinatorial optimization problems to nuclear radiation metrology.