论文标题
低能能处的高纯度共晶锗探测器的精确效率校准
Precision efficiency calibration of a high-purity co-axial germanium detector at low energies
论文作者
论文摘要
在100 keV以上的能量区域进行的工作之后，在100 keV以下的能量区域继续进行了同轴高纯晶型探测器的高精度校准。先前的测量或蒙特卡洛模拟已重复使用更高的统计数据，并添加了新的源测量。高能部分中的精度，即已达到0.2％的检测效率的绝对精度。通过研究用于检测低能光子的锗X射线逃生概率，进一步审查了锗检测器的低能行为。此外，一个实验点，即38K衰减的2168 KEV的伽玛射线，总比率与模拟良好一致。还为单次示例概率添加了相同的伽玛射线。最后，通过定期测量具有精确校准的60CO源的全能量峰效率，研究了锗探测器效率的长期稳定性，发现在10年内非常稳定。
Following work done in the energy region above 100 keV, the high-precision calibration of a co-axial high-purity germanium detector has been continued in the energy region below 100 keV. Previous measurements or Monte-Carlo simulations have been repeated with higher statistics and new source measurements have been added. A precision as in the high-energy part, i.e. an absolute precision for the detection efficiency of 0.2%, has been reached. The low-energy behaviour of the germanium detector was further scrutinized by studying the germanium X-ray escape probability for the detection of low-energy photons. In addition, one experimental point, a gamma ray at 2168 keV from the decay of 38K, has been included for the total-to-peak ratios agreeing well with simulations. The same gamma ray was also added for the single- and double-escape probabilities. Finally, the long term stability of the efficiency of the germanium detector was investigated by regularly measuring the full-energy peak efficiency with a precisely calibrated 60Co source and found to be perfectly stable over a period of 10 years.
