title: Standardization of 241Am solution.
abstract: The standardization of 241 Am solution has been undertaken using a 4pibeta-gamma coincidence system. The 4pi proportional counter used for alpha detection has a 0.1 mm thick Al window in the outside wall in order to minimize gamma-ray attenuation. The extrapolation technique was applied to determine the activity of the solution. The variation of alpha efficiency has been made using external absorbers and by the electronic discrimination. The results from the two methods were compared and are in agreement within the experimental uncertainty.
authors.affiliation: Istituto de Pesquisas Energéticas e Nucleares, São Paulo, Brazil. koskinas@net.ipen.br
authors.forename: Marina F
authors.initials: MF
authors.lastname: Koskinas
authors.forename: Eliezer A
authors.initials: EA
authors.lastname: Silva
authors.forename: Ione M
authors.initials: IM
authors.lastname: Yamazaki
authors.forename: Mauro S
authors.initials: MS
authors.lastname: Dias
mesh_terms: D000465:Algorithms; D000576:Americium / Q000032:analysis* / Q000592:standards*; D001938:Brazil; D017408:Guidelines as Topic; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods* / Q000592:standards*; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012996:Solutions; D013051:Spectrometry, Gamma / Q000379:methods* / Q000592:standards*
chemical_list: D012996:Solutions; D000576:Americium