Standardization of 241Am by digital coincidence counting, liquid scintillation counting and defined solid angle counting
Autor: | M.E. Capoulat, C. Balpardo, D. Rodrigues, P. Arenillas |
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Jazyk: | angličtina |
Rok vydání: | 2010 |
Předmět: |
Physics
Radiation Americium International Cooperation Liquid scintillation counting Analytical chemistry Solid angle Extrapolation Uncertainty FOS: Physical sciences Proportional counter Reproducibility of Results Reference Standards Alpha Particles Computational physics Scintillation Counting Coincidence counting Alpha decay Nuclide Nuclear Experiment (nucl-ex) Radiometry Nuclear Experiment Energy (signal processing) |
Popis: | The nuclide 241Am decays by alpha emission to 237Np. Most of the decays (84.6%) populate the excited level of 237Np with energy of 59.54 keV. Digital coincidence counting was applied to standardize a solution of 241Am by alpha–gamma coincidence counting with efficiency extrapolation. Electronic discrimination was implemented with a pressurized proportional counter and the results were compared with two other independent techniques: Liquid scintillation counting using the logical sum of double coincidences in a TDCR array and defined solid angle counting taking into account activity inhomogeneity in the active deposit. The results show consistency between the three methods within a limit of a 0.3%. An ampoule of this solution will be sent to the International Reference System (SIR) during 2009. Uncertainties were analysed and compared in detail for the three applied methods. |
Databáze: | OpenAIRE |
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