TOPAS MC software was used to model the efficiency of a coaxial p-type HPGe detector, type GX9023 from Canberra. The model was validated by comparing experimental efficiencies with efficiencies calculated by TOPAS MC simulations. Three different geometries of radionuclide sources, placed at different heights from the detector endcap, were used to validate the model. The imposed criteria of 5% relative difference was met for a range of radionuclides and gamma-ray energies. As a result, the created detector model with TOPAS MC was considered validated.

中文翻译：

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验证TOPAS MC对扩展范围的同轴p型HPGe检测器的效率建模的有效性

使用TOPAS MC软件对堪培拉的GX9023型同轴p型HPGe检测器的效率进行建模。通过将实验效率与TOPAS MC仿真计算的效率进行比较，验证了模型的有效性。三种不同几何形状的放射性核素源（放置在距探测器端盖不同的高度处）用于验证模型。对于一定范围的放射性核素和伽马射线能量，达到了5％的相对差的标准。结果，使用TOPAS MC创建的检测器模型被认为是有效的。