<sup>133</sup>Ba面源效率转移法刻度<sup>133</sup>Xe气体源HPGe探测效率

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¹³³Ba面源效率转移法刻度¹³³Xe气体源HPGe探测效率

1.
Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Department of Engineering Physics,Tsinghua University,Beijing 100084,China;
2.
Northwest Institute of Nuclear Technology,Xi’an 710024,China;
3.
School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China

摘要: 提出使用面源进行效率转移法刻度133Xe气体体源的探测效率。使用133Ba面源模拟刻度放射性133Xe气体体源的探测效率，在刻度的过程中利用137Cs与133Ba的峰效率比值及133Ba面源远端无符合相加效应，137Cs能峰远近都无符合相加效应等，结合软件模拟建立远近距离峰效率比值的关系，来解决133Ba的符合相加效应。最后，使用面源效率转移法进行气体体源效率刻度，转移法刻度结果和面源模拟法刻度计算值的偏差在1％以内。
- 面源 /
- LabSOCS /
- 效率刻度
Abstract: An efficiency transfer code based on disk source is established to calibrate efficiency of 133Xe gas sample. 133Ba disk sources were used to simulate the detection efficiency of 133Xe cylindrical volume source. Relationships were established based on peak efficiency ratio between 137Cs and 133Ba. Cascade summing effects in close geometry gamma-ray spectrum of 133Ba was solved based on the ratios calculated by LabSOCS simulation and the experiment data of long and short distances. Finally, the efficiency transfer code is used to calibrate 133Xe gas samples efficiency. The detection efficiencies using the efficiency transfer code are consistent with the results of disk source simulation with discrepancy about 1％.
- disk source /
- LabSOCS /
- efficiency calibration