Characterization of a radiochromic silicone dosimeter

A radiochromic silicone based dosimeter has been fabricated that allows for threedimensional (3D) dose verification. This paper characterizes the silicone dosimeter and verifies previous results found by other research groups. Using a recipe found to be dose rate independent, we identify the spectra of the dosimeter irradiated to different doses and verify that the response from different dose rate deliveries is constant within uncertainty. The reproducibility of a response from identically irradiated and stored cuvettes is also investigated. A noticeable difference in response indicates that there is an inhomogeneous distribution of active ingredients due to the viscous nature of the dosimeter during fabrication. Irradiating multiple cuvettes to the same dose in different fractions shows that the response decreases as the number of fractions increases.