NAA WITH GAMMA-LINE RELATED (K(O)) AND ISOTOPE RELATED (K(I)) ANALYTICAL FACTORS

The k(o)-standardization method is based on analytical constants, whic h are gamma-line related and the results we calculated from the peak a reas of the gamma-ray spectrum. Consequently, prerequisites of this me thod are the correct identification of the gamma-lines and the avoidan ce of unresolved peak interferences. Because these problems are alread y solved with nuclide identification programs, a new variant of the k( o)-method we developed, using the activities of the nuclides instead o f the peak areas. We introduced isotope related factors, k(i), calcula ted from k(o)-factors. The procedure is described and results are comp ared with those obtained by the gamma-line based method.