Determination of aluminium concentration in copper–aluminium alloys using γ-ray transmission techniques

Disk foils of copper aluminium alloys of 7.07 cm2 and thickness from 0.39 to 0.83 cm are used as targets for γ-rays photons of energies 81 and 356 keV. Single and dual energy transmission techniques were applied to determine the concentration of aluminium as a minor component. It is concluded that aluminium concentration can be determined with an accuracy of more than or equal to 98.53 and 99.09% in the cases of single and dual energy gamma-ray transmission techniques, respectively. The results of the two techniques are compared with results from chemical analysis. Discrimination between single and dual energy methods depends on the error due to the counting rate and mass thickness.