A Gamma-Ray Spectrum Analysis Technique for Low-Level Environmental Radionuclides

The requirements for gamma-ray spectra analysis for low-level environmental radionuclides are reviewed. Special emphasis is placed on the routine and rapid analysis of large numbers of samples. Pertinent requirements for analysis include the system energy and efficiency calibration, the library of gamma rays of concern, criteria of establishing the limits of sensitivity and techniques used for gamma-ray intensity and background determinations. An analysis code (CETUS) used with a Ge(Li) detector and multichannel analyzer interfaced to a programmable desk-top calculator is described.