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Radiation Protection Dosimetry 101:69-72 (2002)
© 2002 Oxford University Press

Glow Curve Analysis of Composite Peak 5 in LiF:Mg,Ti (TLD-100) Using Optical Bleaching, Thermal Annealing and Computerised Glow Curve Deconvolution

S. Biderman, Y. S. Horowitz, L. Oster, Y. Einav and Y. Dubi

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 ancillary 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).


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Y. S. Horowitz, D. Satinger, and O. Avila
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 Radiat Prot DosimetryHome page
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