การประชุมวิชาการระดับชาติ ครั้งที่ 16
มหาวิทยาลัยราชภัฏนครปฐม

This research aims to study the radiation shielding properties of sodium-calcium silicate glass added with bismuth oxide (Bi₂O₃). Glass formulas with xBi₂O₃: (20-x)SnO₂: 20Na₂O : 10CaO : 50SiO₂ at different concentrations (when x = 0, 5, 10, 15 and 20 mol percent) were prepared by melt quenching technique. Radiation shielding properties including mass attenuation coefficient (µ_m), half-value layer (HVL), effective atomic number (Z_eff), and effective electron density (N_eff) with an energy of 662 keV were calculated by experimental and theoretical methods. The Cesium-137 (Cs-137) was the radioactive source used in the experiment. The experimental results were compared with the theoretical values of the µ_m, HVL, Z_eff, and N_eff calculated from the WinXCom program. The research results found that µ_m, Z_eff, and N_eff increased with increasing bismuth concentration, and it was found that the HVL decreased with increasing bismuth concentration.