Comparison of gamma ray non-destructive assay measurement techniques

Several techniques based on gamma-ray measurements are commonly available for both Safeguards measurements and Non- Destructive Assay (NDA) of radionuclides including Special Nuclear Material, including plutonium and uranium. The techniques discussed here are referred to as: “ISO-CART”, “QED”, “SGS” and “TGS”; some include shielded chambers for the lowest activity measurements.