Radiochromic film containing methyl viologen for radiation dosimetry
2007
Abstract Poly(vinyl alcohol) (PVA) films containing methyl viologen (MV 2+ ) that colours blue upon exposure to ionizing radiation were investigated as possible dosimeters for use in radiation processing applications. In order to find the most suitable composition of the PVA-MV 2+ film, different concentrations of the dye have been studied. The absorbance values at selected wavelengths, obtained from irradiation of the PVA film containing the most suitable MV 2+ concentration, can be satisfactorily related to the absorbed dose over a wide range, from 50 Gy up to 40 kGy. The effects of dose, dose rate, humidity and temperature on the response of the PVA-MV 2+ dosimeter film have been studied under laboratory conditions. We conclude that the PVA film containing MV 2+ is a promising tool for the absorbed dose measurements in several industrial applications of ionizing radiations.
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