Correction factors for non-uniform large-area reference sources
| Autor: | Maria da Penha Albuquerque Potiens, Hélio Yoriyaz, G.M.A.A. Sordi, Eduardo do Nascimento, Vitor Vivolo, Paulo T.D. Siqueira, Iremar Alves Silva |
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| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
Radiation Uniform distribution (continuous) 010403 inorganic & nuclear chemistry 01 natural sciences 030218 nuclear medicine & medical imaging 0104 chemical sciences 03 medical and health sciences 0302 clinical medicine Distribution (mathematics) Calibration Environmental science Representation (mathematics) Counting rate Intensity (heat transfer) Remote sensing |
| Zdroj: | Applied Radiation and Isotopes. 160:109082 |
| ISSN: | 0969-8043 |
| DOI: | 10.1016/j.apradiso.2020.109082 |
| Popis: | Based on uniformity measurements of large-area reference sources used in calibration procedures of surface contamination monitors, an investigation was carried out to obtain a method that estimates the bias originated from surface source intensity distribution deviation from the ideal uniform distribution and corrects it. It relies on correcting the estimated instrument efficiency by applying correction factors driven from the uniformity distribution profiles of the sources used in calibration procedure. Simulations of the monitor calibration procedure are run for 2 distinct surface source distributions: the real and the ideally uniform distributions. Correction factors are driven from counting rate estimates obtained from each source representation. In order to evaluate adequacy of this proposition it was validated against a method proposed by the NPL in the Good Practices Guide No.14. |
| Databáze: | OpenAIRE |
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