Comparative Study between Lead Oxide and Lead Nitrate Polymer as Gamma-Radiation Shielding Materials  

作　　者：A. M. Madbouly E. R. Atta A. M. Madbouly;E. R. Atta(Egyptian Nuclear and Radiological Regulatory Authority, Cairo, Egypt)

机构地区：[1]Egyptian Nuclear and Radiological Regulatory Authority, Cairo, Egypt

出　　处：《Journal of Environmental Protection》2016年第2期268-276,共9页环境保护（英文）

摘　　要：In this work, the Styrene-butadiene rubber (SBR)/lead oxide and the Styrene-butadiene rubber (SBR)/lead nitrate composites were prepared as gamma-radiation shielding materials. The investigated materials were prepared with three different weight percentage of lead oxide and lead nitrate (30, 50 and 70 wt%). The mass attenuation coefficients (μ_m) for all composite samples were measured experimentally at 511 and 661.6 keV photon energies. The measurements were made by performing transmission experiments with a 3'' × 3'' NaI (Tl) scintillation detector, which had an energy resolution of 7% at 0.662 MeV for the gamma-rays from the decay of ¹³⁷Cs. The effective atomic numbers (Z_eff) and the effective electron densities (N_eff) were determined experimentally. Also they were determined theoretically using the obtained μ_m values for the studied composites samples by WinXCom program. The obtained results show that the experimental values of the composites are found to be in a good agreement with the theoretical values. It is recognized that the mass attenuation coefficient (μ_m), effective atomic numbers (Z_eff) and the effective electron densities (N_eff) are increased in the composite samples which contain lead oxides than which contain lead nitrates. Finally, the Styrene-butadiene rubber (SBR)/lead oxide is better than Styrene-butadiene rubber (SBR)/lead nitrate polymer as gamma radiation shielding.In this work, the Styrene-butadiene rubber (SBR)/lead oxide and the Styrene-butadiene rubber (SBR)/lead nitrate composites were prepared as gamma-radiation shielding materials. The investigated materials were prepared with three different weight percentage of lead oxide and lead nitrate (30, 50 and 70 wt%). The mass attenuation coefficients (μ_m) for all composite samples were measured experimentally at 511 and 661.6 keV photon energies. The measurements were made by performing transmission experiments with a 3'' × 3'' NaI (Tl) scintillation detector, which had an energy resolution of 7% at 0.662 MeV for the gamma-rays from the decay of ¹³⁷Cs. The effective atomic numbers (Z_eff) and the effective electron densities (N_eff) were determined experimentally. Also they were determined theoretically using the obtained μ_m values for the studied composites samples by WinXCom program. The obtained results show that the experimental values of the composites are found to be in a good agreement with the theoretical values. It is recognized that the mass attenuation coefficient (μ_m), effective atomic numbers (Z_eff) and the effective electron densities (N_eff) are increased in the composite samples which contain lead oxides than which contain lead nitrates. Finally, the Styrene-butadiene rubber (SBR)/lead oxide is better than Styrene-butadiene rubber (SBR)/lead nitrate polymer as gamma radiation shielding.

关 键 词：Leads Oxide Lead Nitrate Mass Attenuation Coefficient Electron Density Effective Atomic Number XCOM Program Gamma Ray SHIELDING 

分 类 号：TB3[一般工业技术—材料科学与工程]