Helmer R G, Nica N, Hardy J C, Iacob V E
Idaho National Engineering and Environmental Laboratory, Idaho Accelerator Center, Idaho State University, P.O. Box 1625, Pocatello, Idaho Falls, ID 83415-2114, USA.
Appl Radiat Isot. 2004 Feb-Apr;60(2-4):173-7. doi: 10.1016/j.apradiso.2003.11.012.
Previously we used relative and absolute efficiency measurements combined with Monte Carlo calculations to define the efficiency of an HPGe gamma-ray detector with 0.2% accuracy from 50 to 1400 keV. This work has been extended to 4.8 MeV with measurements of relative efficiencies from 24Na, 56Co, and 66Ga sources. The combined results of experiment and calculation yield an efficiency curve up to 3.5 MeV with 0.4% accuracy. Single- and double-escape peak contributions also agree with calculation if positron annihilation-in-flight is incorporated.
此前，我们使用相对效率和绝对效率测量方法，并结合蒙特卡罗计算，在50至1400 keV范围内以0.2%的精度定义了HPGe伽马射线探测器的效率。这项工作已扩展到4.8 MeV，通过测量来自24Na、56Co和66Ga源的相对效率来实现。实验和计算的综合结果给出了一条高达3.5 MeV且精度为0.4%的效率曲线。如果考虑飞行中正负电子湮灭，单逃逸峰和双逃逸峰的贡献也与计算结果相符。
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