The γ Ray Peak Effciency Determination for Volume Samples Using a Radioactive Point Source

Abstract

The peak efficiencies for volume samples in γ spectrometry of environmental radioactive materials have been determined using a radioactive standard point source. The advantages of the method, as compared with the conventional calibration method using standard volume sources, are as follows; 1) The peak efficiencies can be obtained with high accuracy and precision, 2) To be applied easily to any sample container being axial symmetry, 3) The correction for selfabsorption can be performed by the simple calculation. On the other hand, the application of the method is restricted to only the cylindrical or coaxial detector.