Effect of DMSO on the sensitivity and diffusion of FPGX gel dosimeter

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• 作者：Chenting Jin^a ; Jie Chen^a ; ^{jchen@shu.edu.cn} ; Liming Yang^a ; Wenyun Luo^a ; Guohua Wu^b ; Yuanzi Zha^b
• 关键词：Hydrogel ; 3D dosimeter ; DMSO ; Free radical scavenger ; Diffusion rate
• 刊名：Radiation Physics and Chemistry
• 出版年：2012
• 期刊代码：68_0969806x
• 类别：ph
• 出版时间：July, 2012
• 卷：81
• 期：7
• 页码：879-883
• 文件大小：420 K

摘要

A stable hydrogel 3D dosimeter was prepared by using Fricke solution, poly (vinyl alcohol) (PVA) and glutaraldehyde (GA). A linear relationship between the dose and the UV absorbency was obtained by determining the color change of the dosimeter in the range of 0-2.5 Gy. Dimethyl sulfoxide (DMSO) was used as a free radical scavenger to analyze the thermo-stability and diffusion of FPGX gel dosimeter systems. The results showed that increasing the DMSO concentration could slow down the color change and the Fe³⁺ diffusion rate in a certain range. With the addition of DMSO, the FPGX gel dosimeter was stable in the storage time before exposure to radiation.