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

Zhu Chaoyang; Li Litao; Wang Zhentao

doi:10.13832/j.jnpe.2023.01.0148

Volume 44 Issue 1

Feb. 2023

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Zhu Chaoyang, Li Litao, Wang Zhentao. Study on the Effect of Boron-coated Thickness of Boron-coated Proportional Counter Tube on the Detection Efficiency[J]. Nuclear Power Engineering, 2023, 44(1): 148-153. doi: 10.13832/j.jnpe.2023.01.0148

Citation:

Zhu Chaoyang, Li Litao, Wang Zhentao. Study on the Effect of Boron-coated Thickness of Boron-coated Proportional Counter Tube on the Detection Efficiency[J]. Nuclear Power Engineering, 2023, 44(1): 148-153. doi: 10.13832/j.jnpe.2023.01.0148

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

doi: 10.13832/j.jnpe.2023.01.0148

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China

Received Date: 2022-03-24
Rev Recd Date: 2022-10-25
Publish Date: 2023-02-15

Abstract

Abstract

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.
- Boron-coated proportional counter tube,
- SRIM,
- Boron-coated thickness,
- Detection efficiency

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References(15)

References

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