Standardization and determination of the total internal conversion coefficient of In-111.
The standardization of (111)In by means of a 4πβ-γ coincidence system, composed of a proportional counter in 4π geometry, coupled to a 20% relative efficiency HPGe crystal, for measuring gamma-rays is presented. The data acquisition was performed by means of the software coincidence system (SCS) and the activity was determined by the extrapolation technique. Two gamma-ray windows were selected: at 171 keV and 245 keV total absorption peaks, allowing the determination of the total internal conversion coefficient for these two gamma transitions. The results were compared with those available in the literature.
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP 05508-000, Brazil.
Izabela T
IT
Matos
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP 05508-000, Brazil. Electronic address: koskinas@ipen.br.
Marina F
MF
Koskinas
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP 05508-000, Brazil.
Tatiane S
TS
Nascimento
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP 05508-000, Brazil.
Ione M
IM
Yamazaki
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP 05508-000, Brazil.
Mauro S
MS
Dias
Primary standardization of In-111; Software coincidence counting; Total internal conversion coefficient