Glow curve analysis of composite peak 5 in LiF:Mg,Ti (TLD-100) using optical bleaching, thermal annealing and computerised glow curve deconvolution
| Autor: | Y.S. Horowitz, Y. Einav, L. Oster, Yonatan Dubi, S Biderman |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Titanium
Radiation Materials science Radiological and Ultrasound Technology Relative intensity business.industry Glow curve deconvolution Composite number Public Health Environmental and Occupational Health Analytical chemistry General Medicine Equipment Design Fluorides Quality (physics) Optics Glow curve Lithium Compounds Thermodynamics Radiology Nuclear Medicine and imaging Magnesium Thermoluminescent Dosimetry Irradiation Thermoluminescent dosimeter business Intensity (heat transfer) |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0144-8420 |
| Popis: | The relative intensity of glow peak 5a in the composite glow peak 5 of LiF:Mg,Ti (TLD-100) is very weak following gamma irradiation, and has been estimated at approximately 0.1 of the intensity of peak 5. Typical glow curve analysis using computerised glow curve deconvolution with unconstrained variation of the peak shape parameters, yields values of the relative intensity of glow peak 5a varying from 0 to 15%. Due to the potential of peak 5a to fulfil the criteria of a quasi-tissue-equivalent nanodosemeter which estimates quality factor, considerable efforts have been invested in ancilliary techniques to improve the reliability of the estimation of the intensity of peak 5a. Optical bleaching and thermal annealing techniques were used to obtain single-peak glow curves consisting of peak 4 only and peak 5 only. A multi-stage CGCD protocol was then constructed using these peak shape parameters for peaks 4 and 5, which allows more accurate estimation of the relative intensity of peak 5a. Following 60Co irradiation of ten chips to a dose level of 1 Gy, the technique yields a relative intensity of 0.08 +/- 0.008 (1 SD). |
| Databáze: | OpenAIRE |
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