Study on the Effect of Boron-coated Thickness of Boron-coated Proportional Counter Tube on the Detection Efficiency

被引：0

作者：

Zhu C. ^{[1
]}

Li L. ^{[1
]}

Wang Z. ^{[1
]}

机构：

[1] Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing

来源：

Hedongli Gongcheng/Nuclear Power Engineering | 2023年 / 44卷 / 01期

关键词：

Boron-coated proportional counter tube; Boron-coated thickness; Detection efficiency; SRIM;

D O I：

10.13832/j.jnpe.2023.01.0148

中图分类号：

学科分类号：

摘要：

The boron-coated proportional tube is a key device for monitoring the neutron fluence outside the reactor pressure vessel. The boron-coated thickness of the boron-coated proportional tube affects its intrinsic detection efficiency. Simulating the transport process of the 7Li and α generated by 10B(n,α)7Li in the boron layer with different thicknesses, and calculating the overall ion emission rate on boron layer interface and further the calculation method of the intrinsic detection efficiency of the boron-coated proportional counting tube is proposed. The results of simulation and calculation show that: when 10B(n,α)7Li is under unit nuclear reaction rate, the overall ion emission rate on boron layer interface is positively linearly correlated with the thickness of the boron layer when it is less than 1.5 μm, and increases more slowly with the increase of the thickness of the boron coating when it is greater than 1.5 um, finally the overall ion emission rate on boron layer interface reaches the maximum–1.3×10−4 (cm2·s)−1 when the thickness of the boron coating is 3.6 μm. Based on the results of the overall ion emission rate, the relationship curve between the boron coating thickness and the intrinsic detection efficiency of the boron-coated proportional counting tube was further calculated, which can provide reference value for selecting an appropriate thickness of boron coating to define the best detection efficiency in the manufacturing of the boron-coated proportional tube. © 2023 Yuan Zi Neng Chuban She. All rights reserved.

引用

页码：148 / 153

页数：5

共 15 条

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