Development of PVA/Ag and PVA/NBT/Ag-Based Dosimeter Films with Optimized Concentration for Radiation Detection

Abstract

This study aims to develop Polyvinyl Alcohol (PVA)-based dosimeter films with the addition of silver (Ag) and Nitroblue Tetrazolium (NBT) to enhance radiation detection. Two types of films were tested: PVA/Ag (0.75%) and PVA/NBT/Ag (0.75%). The film fabrication process involved dissolution, drying at room temperature, and cutting for testing with X-rays at varying voltages. Characterization was performed using UV-Vis spectra analysis and optical density measurements. The results showed that the PVA/NBT/Ag film exhibited higher absorbance compared to PVA/Ag, both before and after radiation exposure. A significant increase in optical density demonstrated a higher sensitivity for PVA/NBT/Ag, with an R² value of 0.9571, indicating better linearity compared to PVA/Ag (R² = 0.8821). Based on these findings, the PVA/NBT/Ag film is more effective in detecting radiation doses, making it a promising candidate for X-ray dosimetry.