FRANCO BRANCACCIO

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Primary standardization and determination of gamma ray emission intensities of Ho-166
2020 - YAMAZAKI, I.M.; KOSKINAS, M.F.; MOREIRA, D.S.; SEMMLER, R.; BRANCACCIO, F.; DIAS, M.S.
The procedure followed by the Nuclear Metrology Laboratory (LMN) at the IPEN-CNEN/SP, in S~ao Paulo, for the primary standardization of 166Ho is described. The activity of 166Ho was determined by the efficiency extrapolation technique applied to a 4πβ(PC)-γ coincidence system using a gas flow proportional counter in 4π geometry coupled to a 76 x 76 mm NaI(Tl) crystal. The results for the γ-rays intensities at 80.57 and 1379.45 keV were 0.0651(11) and 0.00904(11), respectively.
Standardization of 59Fe by 4π(PC)β–γ software coincidence system
2016 - KOSKINAS, M.F.; POLILLO, G.; BRANCACCIO, F.; YAMAZAKI, I.M.; DIAS, M.S.
The procedure for the standardization of 59Fe using a 4π(PC)β–γ software coincidence system is de-scribed. The standardization was performed with an experimental setup consisting of a thin window gas- flow proportional counter (PC)in4π 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 Colldion films andaluminum foils as external absorbers.