Gamma-ray attenuation characteristics of PVA/titanium dioxide nanocomposites

This study examines the gamma-ray and neutron shielding capabilities of polyvinyl alcohol (PVA) composites modified with titanium dioxide (TiO2) nanoparticles. The PVA/TiO2 composites were made through a solution casting method with a filler concentration of 5, 10, and 15 wt.% to enhance the attenuation of gamma-ray and neutron radiation material. The properties were studied, both structurally and morphologically, using XRD and SEM, and gamma-ray spectrometry, specifically for gamma-ray and neutron shielding properties. The observations noted that the maximum mass attenuation coefficient (μm) attained was 0.1638 cm²/g at 122 keV for the 15 wt.% TiO2 composites. Likewise, the half-life values (HVL) and tenth value layers (TVL) values were also the lowest for the 15 wt.% TiO2 composites, reflecting their effective shielding efficiency. The effective atomic number (Zeff) and mean free path (MFP) were also improved, confirming the improved attenuation conditions. Therefore, the findings of the study will allow Ti15 composites to be used as lightweight, flexible, and environmentally friendly radiation protection and shielding in various clinical, nuclear, and aerospace applications.