Monte Carlo calculations of the HPGe detector efficiency for radioactivity measurement of large volume environmental samples
| Autor: | Mohamed Belgaid, Ahmed Azbouche, Hakim Mazrou |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Radioisotopes Work (thermodynamics) Standard sample Germanium Health Toxicology and Mutagenesis Monte Carlo method Analytical chemistry General Medicine Models Theoretical Pollution Computational physics Semiconductor detector Matrix (mathematics) Volume (thermodynamics) Europium Consistency (statistics) Cesium Radioisotopes Radiation Monitoring Environmental Chemistry Soil Pollutants Radioactive Hpge detector Waste Management and Disposal Monte Carlo Method |
| Zdroj: | Journal of environmental radioactivity. 146 |
| ISSN: | 1879-1700 |
| Popis: | A fully detailed Monte Carlo geometrical model of a High Purity Germanium detector with a 152Eu source, packed in Marinelli beaker, was developed for routine analysis of large volume environmental samples. Then, the model parameters, in particular, the dead layer thickness were adjusted thanks to a specific irradiation configuration together with a fine-tuning procedure. Thereafter, the calculated efficiencies were compared to the measured ones for standard samples containing 152Eu source filled in both grass and resin matrices packed in Marinelli beaker. From this comparison, a good agreement between experiment and Monte Carlo calculation results was obtained highlighting thereby the consistency of the geometrical computational model proposed in this work. Finally, the computational model was applied successfully to determine the 137Cs distribution in soil matrix. From this application, instructive results were achieved highlighting, in particular, the erosion and accumulation zone of the studied site. |
| Databáze: | OpenAIRE |
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