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

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 Fe~(3+) 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.