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Investigation of the dose rate and linear-energy-transfer of the signal quenching of radiochromic silicone-based dosimeters for different curing times and compositions

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, , Citation Lia Barbosa Valdetaro et al 2023 J. Phys.: Conf. Ser. 2630 012021 DOI 10.1088/1742-6596/2630/1/012021

1742-6596/2630/1/012021

Abstract

The response of radiochromic dosimeters based on silicone is influenced by the dose-rate quenching and also the linear energy transfer (LET). However, the impact of curing time and composition on quenching has not been fully characterized. We investigated two dosimeter compositions, with 5% and 9% curing agent, which cured for 1, 3 or 5 days and that subsequently were irradiated with an 80 MeV proton beam with three different beam currents. Monte Carlo simulations were utilised for the estimation of dose, dose rate and LET profiles. We found a significant decrease in LET-dependent quenching with curing time, but no significant decrease in dose-rate-dependent quenching.

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10.1088/1742-6596/2630/1/012021