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KMID : 0371819970290050385
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Nuclear Engineering and Technology
1997 Volume.29 No. 5 p.385 ~ p.392
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The Retrieval of Abnormal TL Glow Curves Using Modified Glow Curve Analysis Method
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Lee, Sang-Yoon
Lee, Kun-Jai/Kim, Jang-Lyul/Chang, Si-Young
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Abstract
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The shape of TL glow curve is a useful indicator for assurance of correct reading of the personal dosimeter. Since the reading procedure of TLD is irreversible, however, an analytic remedy should be considered to procure reliable dosimetric information for the readings with irregular glow curve shape. In this study, kinetic trapping parameters of CaSOa : Dy Teflon personal dosimeter(Teledyne PB-6A) were analyzed by Halperin and Braner´s model for general-order kinetics. From these kinetic trapping. parameters, we also developed a simple procedure to retrieve the dosimetric information from abnormally distorted glow curves. The computerized glow curve deconvolution(CGCD) fitting of the reference glow curve with kinetic parameters from this study yields relative errors of about 5% from the expected integral. It was also found that the glow curve remedial procedure developed could retrieve the distorted TL glow curves within error ranges of 15%. With the glow curve retrieval techniques, doses incurred by gamma radiation can now be succefully re-constructed for the CaSO4 : Dy Teflon dosimeter resulting abnormal glow curves.
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