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Monte Carlo simulation of GM probe and NaI detector efficiency for surface activity measurements |
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| Institution: | 1. Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Brazil;2. Post Graduation Program of Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Brazil;3. BRAIN Laboratory, Hospital de Clínicas de Porto Alegre, Brazil;4. CTN — Centro de Triagem Neonatal, Porto Alegre, Brazil;5. Department of Genetics, Universidade Federal do Rio Grande do Sul, Brazil |
| Abstract: | This paper deals with the direct measurement of total (fixed plus removable) surface activity in the presence of interfering radiation fields. Two methods based on Monte Carlo simulations are used: one for a Geiger–Muller (GM) ionisation probe and the other for sodium iodide (NaI) detector with lead collimators; equations for the most general case and the geometry models for Monte Carlo simulation of both (GM and NaI) detectors are employed. Finally, an example of application is discussed. |
| Keywords: | Beta/gamma surface contamination GM and NaI detectors modelling Monte Carlo simulation |
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