Preparation and Performance of Self-indicating Film Dosimeter

A kind of radiochromic film dosimeter with high sensitivity had been developed by using polydiacetylene compounds as organic dye material, using polyester chips as base material and adding an appropriate amount of photoinitiator. The color of the radiochromic film which was irradiated by γ-ray changed from the light pink to blue. The color would be deepened with the increase of radiation dose; The master and second absorption peak located at 670 nm and 613 nm respectively by using spectrophotometer to test the absorption spectra; There was a good linear relationship between absorbance response at the absorption peaks and the absorbed dose; The response sensitivity would be improved by adding an appropriate amount of photoinitiator in the film formulation; The absorption response would increase by the incensement in thickness of the film and the concentration of the organic dye material; The radiochromic films had been preserved for 100 days at room temperature, avoiding from light. The result showed that the absorption response almost remained unchanged and the film’s stability was good.