title: Numerical modeling of large-area beta sources constructed from anodized-aluminum foils.
abstract: The numerical modeling of large-area beta sources constructed from anodized-aluminum foils is described in this paper. Based on a realistic model for the activity depth distribution, theoretical lower and upper bounds for the efficiency and the transmission coefficient were calculated and used to analyze the comparison method recommended by ISO 8769 for measuring the surface emission rate. The analysis shows that this method can provide measurement results with relative standard uncertainties smaller than 3% for high energy beta emitters such as (90)Sr-(90)Y, (36)Cl and (204)Tl.
authors.affiliation: National Institute of R&D for Physics and Nuclear Engineering "Horia Hulubei" IFIN-HH, P.O. Box MG-6, Bucharest-Magurele R-077125, Romania. doru@ifin.nipne.ro
authors.forename: D
authors.initials: D
authors.lastname: Stanga
mesh_terms: D000535:Aluminum / Q000737:chemistry* / Q000528:radiation effects / Q000592:standards*; D001610:Beta Particles; D003198:Computer Simulation; D004566:Electrodes / Q000592:standards; D008956:Models, Chemical; D011829:Radiation Dosage; D011874:Radiometry / Q000592:standards*; D012015:Reference Standards; D012542:Scattering, Radiation
chemical_list: D000535:Aluminum