Investigating the performance of polytetrafluoroethylene solid free radical dosimeter
This study leverages the ability of polytetrafluoroethylene(PTFE)to generate stable free radicals under ionizing radiation to develop a solid PTFE dosimeter sheet.Experimental results indicate a strong positive correlation between free radical response and absorbed dose over a broad range(1‒180 kGy).The performance of the dosimeter was minimally influenced by dose rate and energy dependence,while the effects of irradiation temperature and post-irradiation storage time on free-radical decay exhibited clear and consistent patterns.Unlike conventional dosimeters used in the industry,the PTFE dosimeter is suitable for high-dose measurements and calibrations,covering a range of 1‒180 kGy with a total uncertainty of less than 5.02%,demonstrating high metrological reliability.This study provides valuable insights into precise dose control and calibration in the irradiation processing of polymers and other functional materials.
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