1. We shall use the term analyte to refer to the specific material within a sample whose assay is to be determined. The analyte is distinguished from the remaining constituents of the sample,which are called the matrix The analyte is sometimes referred to as the source material
2. . R. M. Auguston and T. D. Reilly, Fundamentals for Passive Non‐destructive Assay of Fissionable Material, Los Alamos Scientific Laboratory report no. LA‐5651‐M, 1974.
3. A. Notea, Y. Segal, A. Bar‐Ilan, A. Knoll and N. Shenhav, Proc. Int. Meeting on Monitoring Pu‐ContaminatedWaste, Is‐ pra, Italy, 1979.
4. A. Knoll, A. Notea and Y. Segal, Probablistic Interpretation of Nuclear Waste Assay by Passive Gamma Technique, Nucl. Tech., 56: 351 (1982).
5. R. A. Harlan et al, Operational Assay for Fissile Material in Crated Nuclear Energy Wastes, 6‐th Symp. on Safeguards and Nuclear Material Mgt., ESARDA, Venice, May 1984.