Application of epoxy-Pb3O4 composite for gamma ray shielding

الملخص EN

This paper aims to design types of shielding materials composites to protect public and personnel from the effect of scattered radiation during radiotherapy.

It was found that 20% of lead oxide (Pb3O4) is the maximum percent finally mixed with Epoxy preserving good mechanical properties.

Thermal characterization was discussed using thermal gravimetric analysis.

Mechanical properties were studied by measuring hardness.

Attenuation of gamma rays was carried out on synthesized composite, while some parameters such as thickness of composite, different sources and energies were discussed.

Some shielding factors were measured such as half value layer (HVL), tenth value layer (TVL), attenuation coefficient (μ) and relaxation length (λ).

Durability of the composite was determined by irradiation with gamma rays up to 500 KGy.

Also, the change in gamma attenuation was carried out.

Maximum calculated values of μ is 0.135 cm-1, λ is 7.61 cm, HVL is 5.66 cm and TVL is 17.06 cm were shown in case of 22Na source for 0.551 keV energy which proved the availability for using the Pb3O4 composite as a gamma-ray shielding.