用于测量水性样品的PGNAA系统中HPGe探测器的效率校准。
Efficiency calibration of HPGe detector in a PGNAA system for the measurement of aqueous samples.
作者信息
Cheng Can, Jia Wenbao, Hei Daqian, Li Jiatong, Cai Pingkun, Zhao Dong, Wei Zhiyong
机构信息
College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou 215000, China.
College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou 215000, China.
出版信息
Appl Radiat Isot. 2019 Mar;145:1-6. doi: 10.1016/j.apradiso.2018.12.008. Epub 2018 Dec 7.
In this work, a method was proposed for efficiency calibration of HPGe detector employed in a prompt gamma-ray neutron activation analysis (PGNAA) system for large aqueous sample analysis. Experimental measurements of a reference surface gamma-ray source were combined with efficiency transfer method to obtain efficiency of a volumetric source. Then efficiency curve over the energy range 0.5-8.5 MeV were determined with prompt gamma-rays of chlorine. To evaluate the performance of the calibration curve, an internal standard method was used to determine the aqueous sample containing manganese based on the calibration curve. The 7.058 MeV and 7.243 MeV manganese gamma-ray peaks were used to calculate the mass of manganese. The relative deviations of calculated values and actual value were 5.0% and 6.5%, respectively.
在这项工作中，提出了一种用于大型水样分析的瞬发伽马射线中子活化分析（PGNAA）系统中所使用的高纯锗探测器效率校准的方法。参考表面伽马射线源的实验测量与效率转移方法相结合，以获得体积源的效率。然后利用氯的瞬发伽马射线确定了0.5 - 8.5 MeV能量范围内的效率曲线。为评估校准曲线的性能，基于校准曲线使用内标法测定含锰水样。利用7.058 MeV和7.243 MeV的锰伽马射线峰来计算锰的质量。计算值与实际值的相对偏差分别为5.0%和6.5%。
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