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Portable radon detector for detecting radon concentration in air in public place

A technology of radon concentration in public places, applied in the field of radon concentration detection, can solve the problems of complicated operation and long analysis process, and achieve the effect of simple operation, accurate measurement and small sampling interference

Active Publication Date: 2021-09-03
青海省核工业地质局核地质研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional method for measuring radon is complex in operation and has the disadvantage of a long analysis process.

Method used

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  • Portable radon detector for detecting radon concentration in air in public place
  • Portable radon detector for detecting radon concentration in air in public place
  • Portable radon detector for detecting radon concentration in air in public place

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A scintillation chamber and a photomultiplier tube are arranged inside the detector;

[0031] The inner wall of the scintillation chamber is smeared with ZnS (Ag) crystals, and the scintillation chamber receives the α-rays produced by radon gas and its progeny, and reacts with the ZnS (Ag) crystals to generate fluorescence;

[0032] The photomultiplier tube converts the fluorescent photons into electrons, multiplies and amplifies them, and forms an electric pulse at the anode of the photomultiplier tube.

[0033] Working principle: Based on the scintillation pulse method, the activated carbon tube is used as the adsorbent to collect radon, and then the radon gas is analyzed and enters the scintillation chamber. ) crystals are excited to emit fluorescence. The photons are converted into electrons through the photomultiplier tube and multiplied and amplified. An electric pulse is formed at the anode of the photomultiplier tube, and then amplified by the electronic circui...

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Abstract

The invention discloses a portable radon detector for detecting radon concentration in air in public places, and relates to the technical field of radon concentration detection. A scintillation pulse method is taken as a basis, an activated carbon tube is taken as an adsorbent for radon collection, then radon gas is analyzed to enter a scintillation chamber, and alpha rays generated by the radon gas and daughters of the radon gas are analyzed; and the ZnS (Ag) crystal coated on the inner wall of the scintillation tube is excited to emit fluorescence. Photons are converted into electrons through the photomultiplier and multiplied and amplified, electric pulses are formed at the anode of the photomultiplier, the counting rate of the pulses generated by the alpha rays is recorded after the electric pulses are amplified through an electronic circuit instrument, the pulse counting rate is in direct proportion to the radon concentration within a certain time, and therefore the radon concentration in the air is calculated. The portable radon detector has the advantages of small sampling interference and simplicity in operation.

Description

technical field [0001] The invention relates to the technical field of radon concentration detection, in particular to a portable radon measuring instrument for detecting the radon concentration in the air of public places. Background technique [0002] Radon is a radioactive inert gas, colorless and odorless, produced by the decay of radium. It is the only natural radioactive gas in nature with a density of 9.73kg / m 3 , the specific gravity is 7.5 times that of air, and it is very easy to hide in the indoor ambient air. Since building materials are the main source of indoor radon, especially natural stone containing radioactive elements, it is easy to release radon gas. Among them, the radon content in granite exceeds the standard and the radioactivity is relatively high. [0003] Because it is colorless and odorless, the harm of radon to the human body is also hidden. The harm of radon to the human body is mainly through the continuous accumulation of radon daughters int...

Claims

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Application Information

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IPC IPC(8): G01T1/164
CPCG01T1/1645Y02A50/20
Inventor 马兴娟费发源范志平蒋常菊雷占昌马福宝梁慧贞李学莲曹天琦虞洁杨春雷赵晓珍姜展弢马振营才仁索昂陈晨张祥坤张雷雷刘晓娜赵凌
Owner 青海省核工业地质局核地质研究所
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