GENERAL ACTIVATION AND DECAY FORMULAS AND THEIR APPLICATION IN NEUTRON-ACTIVATION ANALYSIS WITH K(0) STANDARDIZATION

A general formula for nuclear activation and decay is presented. Besid es decay processes, it deals with burnup and successive activation. Th e representationis compact and has a structure comparable to the class ical NAA formulas, used in absence of burnup and activation of daughte r products, A solution is presented to the mathematical singularities appearing when different products have equal time constants. Explicit- expressions are given for typical situations encountered in neutron ac tivation analysis, Its incorporation into the k(0) standardization is demonstrated for several decay types.