Application of radiation physics in the design of the Harshaw 8828 beta–gamma TLD badge

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• 作者：W.J. Chase ; C.R. Hirning
• 关键词：TLD ; Dosimeter design ; Monte Carlo ; Cavity theory
• 刊名：Radiation Measurements
• 出版年：2008
• 期刊代码：71_13504487
• 类别：ce
• 出版时间：February-June 2008
• 卷：43
• 期：2-6
• 页码：525-532
• 文件大小：335 K

摘要

A thermoluminescent dosimeter (TLD) badge has been developed to measure beta and gamma doses for routine personal dosimetry. The badge uses a card with four elements of LiF:Mg,Ti enriched in ⁷Li and sandwiched between layers of Teflon™. The Element 1 filter is of low-Z material, the Element 2 filter is of tin plus of low-Z material, the Element 3 filter is a Mylar window, and the Element 4 filter is of low-Z material. The filters for Elements 2 and 4 were optimized by testing and by application of radiation physics principles and calculation. Elements 1 and 2 are used to measure the response to photons, and from these results, H_p(10), H_p(0.07) for photons, and the photon contribution to the signals for Elements 3 and 4 are obtained. The photon contribution to the signals from Elements 3 and 4 is subtracted from their total signals to obtain two signals due to betas. These are used to derive a corrected value for H_p(0.07) for betas. The badge has been in use since early 1999, and provides accurate results in a nuclear power station environment.