A new highly sensitive radiochromic film electronic dosimeter

A new highly sensitive radiochromic film is developed by using poly(vinyl butyral) as the base and using acetylene-type compounds as organic dye material. It becomes blue after irradiation by an electron beam. The absorbance spectrum is analyzed and the peak in visual region locates at about 675 nm.There is a linear relationship between absorbency and e-flux when irradiated by the same electron energy. The response of absorbency is affected by the sequence radiation. A linear fitting relationship is also discovered between the sensitive layer thickness and absorbency. The sensitivety of the response can be changed when different inverse proportion of halides are added into the radiochromic system. Good stability is proved from environment analysis.