Gamma radiation shielding properties of poly (methyl methacrylate) / Bi2O3 composites. This work investigated the gamma-ray shielding performance, and the physical and mechanical properties of poly (methyl methacrylate) (PMMA) composites embedded with 0-44.0 wt% bismuth trioxide (Bi2O3) fabricated by the fast ultraviolet (UV) curing method.