Standardization of (59)Fe by 4π(PC)ß-γ software coincidence system.

The procedure for the standardization of (59)Fe using a 4π(PC)ß-γ software coincidence system is described. The standardization was performed with an experimental setup consisting of a thin window gas-flow proportional counter (PC) in 4π geometry coupled to a NaI(Tl) scintillator and to a HPGe detector. The data acquisition was carried out by means of a Software Coincidence System (SCS). The beta efficiency was changed by using Collodion films and aluminum foils as external absorbers.