Canadian Nuclear Laboratories, 286 Plant Road, Chalk River, ON, K0J 1J0, Canada.
Appl Radiat Isot. 2022 Sep;187:110335. doi: 10.1016/j.apradiso.2022.110335. Epub 2022 Jun 18.
"Oversimplified" and "simplified" methods based on true coincidence summing effect used in uncomplicated determination of the photo-peak efficiency of the semiconductor High Purity Germanium (HPGe) detector system are suggested and verified. The methods and calibrated Co radioactive source may be used to commission any HPGe detector to use during potential criticality event. The determined accuracy of the semiconductor HPGe detector system using this method is a few percent (for the detector system used in this study it was ≃8% for "oversimplified" and ≃5% for "simplified" methods accordingly) reasonable, expected, and good enough to use for estimation of neutron dose from irradiated human blood in a potential criticality event. Moreover, if one can experimentally deduce the photo-peak efficiency for Co 1333 keV γ-ray line using the suggested methods, then with a few percent accuracy this efficiency could be also used for 1369 keV γ-ray line in the decay of Na isotope.
建议并验证了基于真实符合叠加效应的“简化”和“过于简化”方法，用于简单确定半导体高纯锗（HPGe）探测器系统的光电峰效率。该方法和经校准的 Co 放射性源可用于调试任何在潜在临界事件期间使用的 HPGe 探测器。使用该方法确定的半导体 HPGe 探测器系统的准确度为百分之几（对于本研究中使用的探测器系统，“过于简化”方法约为 8%，“简化”方法约为 5%），合理、可预期，足以用于估算潜在临界事件中辐照人血的中子剂量。此外，如果可以使用建议的方法通过实验推导出 Co 1333keV γ 射线的光电峰效率，那么对于 Na 同位素衰变中的 1369keV γ 射线，以百分之几的准确度也可以使用该效率。
