Research group for radiation transport analysis, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2, Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan.
Radiat Prot Dosimetry. 2021 May 17;193(3-4):228-236. doi: 10.1093/rpd/ncab060.
Ambient dose equivalent rates were measured in the environment of the Fukushima prefecture using NaI(Tl)/CsI(Tl) scintillation detectors and CdZnTe/Ge semiconductor detectors. The dose rates obtained at the same locations varied beyond uncertainty (1σ). By replacing the spectrum-dose conversion operators obtained from the anterior-posterior geometry with those from the rotational geometry, the dose rates agreed with each other within uncertainties, except for a CsI(Tl) scintillation detector with a considerably flat crystal configuration, due to its excessive directional dependence.
采用 Nal(Tl)/CsI(Tl)闪烁探测器和 CdZnTe/Ge 半导体探测器，测量了福岛县环境中的周围剂量当量率。在相同位置获得的剂量率在不确定度（1σ）范围内存在差异。通过用旋转几何形状获得的谱剂量转换运算符替换从前-后几何形状获得的谱剂量转换运算符，除了一个 CsI(Tl)闪烁探测器外，所有剂量率在不确定度范围内都相互一致，这个 CsI(Tl)闪烁探测器的晶体形状非常平坦，因此存在较大的方向依赖性。
