Abstract
The dosimetric characteristics of γ-radiation induced defects in strontium sulfate rod dosimeter are investigated using electron paramagnetic resonance (EPR) technique focusing on the low dose range of 1–100Gy. Significant EPR signals of spectroscopic splitting factor (g) 2.01075, 2.04225, 2.03166, 2.00774 and 1.9219086 are observed in the rod upon γ-irradiation. The intensity of the signals increases linearly with increasing absorbed doses up to 100Gy. The EPR response of irradiated dosimeter exhibits good stability over three months of storage. In addition, the response during irradiation is independent on both relative humidity (from 0% to 65%) and temperature (from 10°C to 35°C). The prepared rods are nearly water equivalent in the range of 0.4–5MeV and the overall uncertainty (2σ) of dose monitoring is approximately 4.26%.
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