Study of Radiation attenuation properties of shields consisting of Nano $\text{WO}_3$ epoxy for prevention from the gamma ray

Abstract

In this study, the shielding properties of gamma rays for shields consisting of epoxy polymer were studied as a base material, reinforced by the oxide of Nano-tungsten oxide ($\text{WO}_3$), with different reinforced ratios (10,20,30,40%), different thickness, to determine the suitability of these shields for use in gamma ray protection. Some parameters were measured such as linear attenuation coefficient ($\mu$), Half value layer, Using source (Cs-137) Emitter of gamma ray energy (662 Kev), Source (Co-60) The emitter of gamma ray energies (1172,1332 Kev). For this purpose, was used The sodium iodide detector NaI(Tl) in the size of ($1.5"\times 1.5"$)inches. The rate of radiation dose was also calculated using attenuation coefficients. The results showed that the linear attenuation coefficient increases when the supported ratio and the thickness of the shield increases and decreases when the gamma ray energy is increased for the radiation source used. The results showed that the dose-rate decreases with the increase in the ratio of the supported and the thickness of the shields, and increase with increasing the energy and radioactive activity of the source. As for the Half value layer decreases when increasing the percentage of support, the opposite happens when energy is increased.