Dose response of radiation-induced low-dose film dosimeter of inorganic salt and red cresol dye blended PVA

Abstract

This work aims to study the effect of X-ray on the optical properties of film dosimeter based on a mixture of inorganic salt and red cresol dyed blended in Polyvinyl alcohol (PVA) matrix. The magnesium sulphate MgSO4 was introduced to the blended polymeric system as a stabilizer and increase the sensitivity of the fabricated dosimetric film. The films were successfully prepared using the casting technique by dissolving magnesium sulphate powder with various molarity into PVA solution and red cresol dye was added to the solution. The films were cut into cuvette sizes and exposed to the X-ray with varying kinetic energy. The optical characterization was performed using UV–visible. It was found that the optical energy gaps values for both irradiated and unirradiated samples shifted to the higher energies for indirect optical bandgap and shifted to lower energies for direct optical bandgap.