Intrinsic self-dosing and long term stability of LiF TLD-100 and GR-200 TL detectors
| Autor: | Antonio Domínguez Delgado, J.C. Saez Vergara, J.M. Gómez Ros, Antonio A. Romero |
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| Předmět: |
Radiation
Materials science Radiological and Ultrasound Technology Salt mine business.industry Detector Public Health Environmental and Occupational Health Analytical chemistry General Medicine Thermoluminescence Highly sensitive Kerma Dosimetry Radiology Nuclear Medicine and imaging Thermoluminescent dosimeter Nuclear medicine business |
| Zdroj: | Scopus-Elsevier |
| Popis: | Intrinsic self-dosing effects on LiF TLD-100 and GR-200 have been studied experimentally. Samples of these thermoluminescent materials have been stored inside the UDO laboratory (Asse salt mine) where background air kerma rates as low as 0.7 nGy.h −1 an reported. After six months storage in this ultra-low background environment very small self-dosing effects were observed in the two materials. With the highly sensitive LiF GR-200 the intrinsic self-dose rate could be directly estimated (∼.8 nGy.h −1 ) since a clear TL signal in excess of the UDO background was detected. For LiF TLD-100 no appreciable TL signal could be detected after storage and consequently, only a maximum limit for the self-dose contribution could be estimated (∼0.9 nGy.h −1 ) based on the minimum detectable dose of the experimental system. The stability of the TL response during the six months at UDO was also studied. Much better stability during storage at room temperature was found in GR-200 than TLD-100 |
| Databáze: | OpenAIRE |
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