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Trace radioactive gas nuclide activity measuring method and device

A radioactive gas and nuclide activity technology, which is applied in the field of trace radioactive gas nuclide activity measurement and devices, and can solve problems such as mutual interference deduction

Active Publication Date: 2015-04-22
北京放射性核素实验室
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for measuring the activity of radioactive gas nuclides in trace amounts, which solves the existing technical problems of measuring radioactive gas nuclides of various components and requires mutual interference deduction, and can achieve high levels of radioactive gas nuclides. Sensitive, high-accuracy detection

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  • Trace radioactive gas nuclide activity measuring method and device
  • Trace radioactive gas nuclide activity measuring method and device
  • Trace radioactive gas nuclide activity measuring method and device

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Embodiment Construction

[0083] The present invention is described in detail below in conjunction with accompanying drawing:

[0084] Figure 1-Figure 4 It is a structural diagram of the device and components of the present invention, as shown in the figure, the measuring device of the present invention is a β-γ coincident measurement system, and the β-γ coincident measurement system includes an inflatable β detector 1, a γ detector, a liquid nitrogen The tile bottle 4 and the coinciding circuit, the inflatable beta detector and the gamma detector are arranged in the lead shielding 3, and the inflatable beta detector includes a bottom 12, a cylinder body 13, a photomultiplier tube 14, an inflation pipeline 6 and a valve 5; the bottom and the photomultiplier tube are respectively located at both ends of the cylinder to form a closed container together with the cylinder. The material of the bottom and the cylinder is the detection material. Set on the inflatable pipeline, the bottom and the outside of ...

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Abstract

The invention relates to a trace radioactive gas nuclide activity measuring method and device. A hollow inflatable beta detector is filled with a radioactive gas nuclide sample. The inflatable beta detector is used for detecting radioactive gas nuclide beta-rays or internal conversion electrons efficiently. A gamma detector is used for measuring gamma-rays or x-rays in high resolution. A beta-gamma coincidence technology is used for lowering a system background. The trace radioactive gas nuclide activity measuring method and device achieves the technical aim that trace xenon isotope activity is detected in high resolution and high sensitivity.

Description

technical field [0001] The invention relates to a method and device for measuring trace radioactive gas nuclide activity, which belongs to the category of low-level radioactivity measurement, and in particular can improve the detection sensitivity of radioactive gas nuclide activity measurement. Background technique [0002] With the gradual increase in the number of nuclear power plants at home and abroad, abnormal releases or accidents of nuclear facilities will cause radioactive gases (mainly inert gases) to leak into the atmosphere, bringing new environmental monitoring problems. Due to the diffusion of these radioactive gases in the atmosphere Dilute and decay continuously, the activity of radioactive xenon in the atmosphere is very low. Therefore, to carry out the measurement of trace radioactive gas activity and improve the detection sensitivity of gas nuclide activity measurement can provide valuable data for early warning, emergency and assessment of nuclear accident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/178
Inventor 王世联李奇贾怀茂樊元庆赵允刚刘蜀疆张新军陈占营常印忠
Owner 北京放射性核素实验室
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