نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه فیزیک دانشگاه جامع امام حسین(ع) تهران ایران
2 دانشکده علوم پایه، گروه فیزیک، دانشگاه جامع امام حسین(ع)، تهران، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This study investigated the gamma-ray and neutron shielding properties of borate glasses doped with Bi₂O₃ (5-25 mol %) using Geant4 simulations in the energy range of 15 keV to 10 MeV. The mass attenuation coefficient was calculated, which allowed the determination of key gamma-ray shielding parameters. The results showed a significant increase in gamma-ray shielding performance with increasing Bi₂O₃ content. The mass attenuation coefficient ranged from 33.58 at low energies to 0.027 cm2/g at high energies, where Glaas-5 showed the highest mass attenuation coefficient. We also extracted other key parameters, including linear attenuation coefficient, mean free path, tenth layer thickness, and shielding efficiency. Importantly, the thickness required for effective gamma-ray shielding was significantly reduced. The TVL for 1 MEV photons was reduced from 10.5 cm for the glass containing 5% bismuth oxide to only 7.8 cm for the sample containing 25% bismuth oxide. Furthermore, the radiation shielding efficiency was close to 100% for energies below 150 keV. The fast neutron removal cross section also increased with increasing bismuth content. We conclude that the glass containing 25% bismuth oxide (Glass-5) exhibits better shielding properties for gamma photons and fast neutrons, making it a promising option for radiation shielding applications.
کلیدواژهها [English]
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