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Device and method for eliminating temperature and humidity effect during measurement of <222>Rn and <220>Rn average concentration

A technology with an average concentration of 220rn, which is applied in the field of nuclear radiation detection, can solve the problems that the electrostatic collection efficiency is greatly affected and the detection efficiency is greatly affected, and achieve the effect of convenient and fast measurement process, improving detection efficiency, and eliminating the effect of temperature and humidity

Pending Publication Date: 2019-02-05
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrostatic collection efficiency is greatly affected by temperature and humidity, resulting in the detection efficiency being greatly affected by the greenhouse temperature

Method used

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  • Device and method for eliminating temperature and humidity effect during measurement of &lt;222&gt;Rn and &lt;220&gt;Rn average concentration
  • Device and method for eliminating temperature and humidity effect during measurement of &lt;222&gt;Rn and &lt;220&gt;Rn average concentration
  • Device and method for eliminating temperature and humidity effect during measurement of &lt;222&gt;Rn and &lt;220&gt;Rn average concentration

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one, measurement 222 Rn, 220 The device for eliminating the effect of temperature and humidity when the average concentration of Rn, including the measurement chamber 1, the bottom plate 2, the solid track detector 3, the aluminum film 4 and the high voltage module 9.

[0023] Described measuring chamber comprises first chamber 1-1, second chamber 1-2 and the 3rd chamber 1-3, the inner wall of first chamber 1-1 and the inner wall of second chamber 1-2 are set There are conductive layer 1-1-1 and conductive layer 1-2-1.

[0024] The wall plate of the first chamber 1-1 is provided with a first ventilation hole 1-1-2, and the first ventilation hole 1-1-2 communicates with the external environment, and a first ventilation hole 1-1-2 is provided with a first ventilation hole 1-1-2. A sponge body plug 5, a second air hole 1-1-3 is provided between the first chamber 1-1 and the third chamber 1-3, and a second air hole 1-1-3 is provided in the second air hole 1-1-3...

Embodiment 2

[0030] Embodiment two: Compared with embodiment one, the difference is that the chamber height of the first chamber 1-1 and the second chamber 1-2 is 3-8cm, and the chamber volume is 200 cm 3, using six solid nuclear track detectors 3 to measure, the solid nuclear track detectors 3 are evenly distributed in the first chamber 1-1 and the second chamber 1-2 respectively, the first chamber 1- The aluminum film 4 covered on the solid nuclear track detector 3 in 1 is connected to the negative electrode of the high voltage module 9 after being connected in series with the wire, and the aluminum film 4 covered on the solid nuclear track detector 3 in the second chamber 1-2 Connect to the negative pole of the high voltage module 9 after being connected in series through wires.

[0031] Compared with the first embodiment, the measurement method is different in that this embodiment uses six solid nuclear track detectors 3 for measurement, and the measurement process is the same.

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Abstract

The invention discloses a device and a method for eliminating a temperature and humidity effect during the measurement of <222>Rn and <220>Rn average concentration. A measurement chamber is fixed on abottom plate through bolts, a solid state nuclear track detector is independently pasted to bottom plates in the first cavity and the second cavity of the measurement chamber, the surface of each solid state nuclear track detector is covered with an aluminum film, the aluminum film and the inner wall electric conduction layer of a measurement chamber are connected with a high-voltage module through traverses, and the high-voltage module is installed in a third cavity. During measurement, through the high-voltage module, voltage is provided for the first cavity and the second cavity, a high-voltage static electric field is formed between the electric conduction layer of the whole cavity of the first cavity and the solid state nuclear track detector as well as between the electric conduction layer of the whole cavity of the second cavity and one solid state nuclear track detector, so that positively charged daughters, which enter the first cavity, of the <222>Rn and the <220>Rn drift tothe surface of the solid state nuclear track detector, and the positively charged daughter, which enters the second cavity through the third cavity of the measurement chamber, of the <220>Rn drifts to the surface of the solid state nuclear track detector, the small cavity and the solid state nuclear track detector are used for eliminating the temperature and humidity effect, and detection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method of synchronously measuring long-term radiation in the environment by using electrostatic collection and solid track detectors 222 Rn, 220 A measuring device and a measuring method for eliminating the effect of temperature and humidity when the average concentration of Rn is used. Background technique [0002] ambient air 222 Rn, 220 Rn is the main source of natural radiation received by the human body, and radiation to the human respiratory system is an important cause of lung cancer. The traditional active measurement method is generally to sample the air, and then use the energy spectrum analysis method to obtain the 222 Rn, 220 Concentration of Rn. This method is accurate and fast, but it can only reflect the data of the sampling time period, and cannot obtain long-term average data. Traditional passive measurement methods generally use soli...

Claims

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Application Information

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IPC IPC(8): G01T5/02G01T7/00
CPCG01T5/02G01T7/00Y02E30/30
Inventor 袁红志谭延亮
Owner HENGYANG NORMAL UNIV