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我们利用蒙特-卡洛光子输运程序研究了典型的欧洲式房屋对γ辐射的屏蔽作用。γ辐射源是沉积在建筑物及周围物体上的放射性和半无限云中的气载放射性核素,对于不同的源能量、在建筑物内外各种不同位置,得出了相应的计算结果。同时研究了附近树木的沉积效应和附近建筑物的屏蔽效应。对于相同的建筑物,把本结果与利用点核积累因子法所得的结果进行了比较。在特定情况下,点核估计法对屏蔽因子的估计要低一个数量级。
We used the Monte-Carlo photon transport procedure to study the shielding effect of typical European houses on gamma radiation. Gamma radiation sources are airborne radionuclides in radioactive and semi-infinite clouds deposited on buildings and surrounding objects. Corresponding calculations are made for different sources of energy at various locations inside and outside the building. At the same time, the deposition effect of nearby trees and the shielding effect of nearby buildings were studied. For the same building, the results were compared with those obtained using the point kernel accumulation factor method. In specific cases, the point-by-point kernel estimation method is an order of magnitude lower than the mask factor estimate.