Fujitaka K, Abe S
Radioisotopes. 1984 Jun;33(6):343-9. doi: 10.3769/radioisotopes.33.6_343.
Physical parameters on the exposure indoors from cosmic ray muons were determined in order to undertake computer simulations. The hitherto known information was compiled, and the unknowns were newly calculated. Assumptions and approximations required in making a practical model were also described. The stopping power and the range of muons in a normal concrete as well as the air were calculated for the energy up to hundreds GeV. The consistency of those results with ready-made tables was found satisfactory although the comparisons were available only in the low energy tail. The scattering effect of cosmic ray muons in building's interior was examined numerically through very simple model calculations. It was revealed that the overall scattering effect would be ignored unless very small variations are wanted. The iron fraction in a reinforced concrete as well as the density of the concrete was also shown to be an ineffective factor.
为了进行计算机模拟，确定了室内宇宙射线μ子暴露的物理参数。汇编了迄今已知的信息，并重新计算了未知信息。还描述了建立实际模型所需的假设和近似值。计算了能量高达数百GeV时μ子在普通混凝土以及空气中的阻止本领和射程。尽管仅在低能尾部有比较数据，但发现这些结果与现成表格的一致性令人满意。通过非常简单的模型计算对宇宙射线μ子在建筑物内部的散射效应进行了数值研究。结果表明，除非需要非常小的变化，否则总体散射效应可以忽略不计。钢筋混凝土中的铁含量以及混凝土的密度也被证明是一个无效因素。
