Development of an optically stimulated luminescence radiometer based on sodium chloride and gold nanoparticles for improving radiation detection in radiography

PURPOSE: :C). METHODS: :C as the reference. Evaluated parameters included OSL signal linearity, reproducibility, bleaching efficiency, fading behavior, minimum detectable signal (MDS), energy dependence, and mass scaling. Measurements were performed using equal and variable detector masses (20-60 g) across a dose range of approximately 6-60 mGy. RESULTS: :C OSL signal at 150 kVp. Increasing detector mass enhanced luminescence output proportionally, with 60 g samples exceeding the reference material at energies above 100 kVp. Bleaching efficiency was notably high, with consistently minimal residual signal, confirming excellent reusability. The MDS was approximately equivalent to 0.4-0.5 mGy in relative terms. However, NaCl + GNPs showed faster fading, with ∼50% signal loss over 9 h, indicating the importance of timely readout or controlled storage. CONCLUSIONS: :C, the NaCl + GNPs detectors demonstrate strong performance, favorable reproducibility, and minimal residual signal, making them a practical option for clinical, educational, and resource-limited dosimetry applications.