A novel gamma rays dosimeter based on organic dye and PVA: microwave synthesis and spectroscopic studies

Abstract

With the quick progression of radiation and irradiation technology such as medical diagnostics, food irradiation, and sterilization, the field of radiation protection has become of great importance. In that context, great fineness sensors are desired to detect the dose of nuclear radiation such as γ-rays [1]. In the present research, we have developed novel chemical-based radiochromic film dosimeters based on zinc phthalocyanine and polyvinyl alcohol (ZnPc/PVA) for the high ionizing radiation, gamma ray. The radiation-induced color bleaching of microwave-synthesized organic dyes [2] increases gradually with increasing absorbed dose in the dose range of 1-25 kGy (Figure 1). Also, the lower absorbance intensity could be observed in changing the color of samples from blue to pale yellow, depending on the dose of gamma radiation. The prepared dosimeters were irradiated with gamma rays from a 60Co source. Furthermore, X-ray diffraction (XRD) measurements and Fourier transform infrared spectroscopy (FT-IR) showed excellent stability for the ZnPc molecule produced by microwave synthesis at the highest applied dose of 25 kGy.