用HPGe探测器光谱的拟合优度检验重建辐射点源的径向位置
Reconstruction of a Radiation Point Source's Radial Location Using Goodness-of-Fit Test on Spectra Obtained from an HPGe Detector
摘要：
高纯锗（HPGe）探测器在核物理实验中无处不在，也用于许多低放射性背景探测器。用Monte Carlo和HPGe探测器测量了$^{60}$ Co和$^{137}$ Cs点源的位置对谱线形状的影响。我们简要地确认以前的工作的相对峰高的位置依赖性。然后，使用Kolmogorov-Smirnov（K-S）拟合优度检验对放置在探测器周围位置的辐射源所拍摄的光谱进行比较。结果表明，用这种方法得到的康普顿连续谱形状对点源的径向位置有很好的敏感性，但对点源的角分辨率很差。最后，我们的位置重建精度作为从源的计数的数量的函数的研究。
英文摘要：
High purity germanium (HPGe) detectors are ubiquitous in nuclear physics experiments and are also used in numerous low radioactive background detectors. The effect of the position of $^{60}$Co and $^{137}$Cs point sources on the shape of spectra were studied with Monte Carlo and HPGe detector measurements. We briefly confirm previous work on the position dependence of relative heights of peaks. Spectra taken with the radiation sources placed at locations around the detector were then compared using the Kolmogorov-Smirnov (K-S) goodness-of-fit test. We demonstrate that with this method the Compton continuum spectral shape has good sensitivity to the radial location of a point-source, but poor angular resolution. We conclude with a study of the position reconstruction accuracy as a function of the number of counts from the source.
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