Polymeric thin films (0.5, 0.42, 0.25 and 0.08 mm thicknesses), containing a microcrystalline dispersion of a proprietary optically stimulated fluor in a plastic matrix, have been developed to measure and image high doses, using a simple, inexpensive table-top fluorimeter dedicated to a fast repetitive readout for large-scale routine dosimetry. The useable absorbed dose range of the system is 5 x 101 to 2 x 105 Gy, with an approximately linear function of relative light emission vs absorbed dose, and a random (type A) uncertainty (coverage factor 1) of dose interpretation of ~3%. The dosimeters are produced in very large reproducible quantities and provide a relatively fast simple analysis based on blue-light stimulation of stable, radiation-induced trapped-charged colour-centre states with emitted red-light photometric readout. Unlike thermoluminescence (TL), the optically stimulated luminescence (OSL) emission at room temperature does not appreciably anneal the luminescent centres, so that stored excited states in the radiation-induced colour centres are stable through many readout cycles, affording archival dosimetry data capability. Dosimeter stability, reproducibility, temperature dependence, humidity dependence, sensitivity to ambient light, and rate dependence are reported on.
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