Abstract
Smooth, bubble free yellow colored thick radiochromic films could be prepared by solvent casted method. The film emulsion contains gelatin, diacetylene microcrystalline particles and yellow dye. Self-standing films of 70 ± 10 micron thickness were obtained that show a distinct visual change in color from yellow to dark green on exposure to 1.25 MeV 60 Co gamma-radiation, with intermediate shades of both the colors in the dose range between 25 cGy and 400 cGy. Optical characterization of the prepared film before and after exposure shows a change in the spectral characteristics from 10 cGy onwards.
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