CN109541666A - Measurement222The device and method of temperature and humidity effect is eliminated when Rn mean concentration - Google Patents

Measurement222The device and method of temperature and humidity effect is eliminated when Rn mean concentration Download PDF

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Publication number
CN109541666A
CN109541666A CN201811426298.7A CN201811426298A CN109541666A CN 109541666 A CN109541666 A CN 109541666A CN 201811426298 A CN201811426298 A CN 201811426298A CN 109541666 A CN109541666 A CN 109541666A
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solid state
chamber
measuring chamber
measurement
track detector
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CN109541666B (en
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袁红志
谭延亮
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Hengyang Normal University
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Hengyang Normal University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/167—Measuring radioactive content of objects, e.g. contamination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

Measurement222The device and method of temperature and humidity effect is eliminated when Rn mean concentration, measuring chamber is fixed by screws on bottom plate, solid state track detector is pasted on the indoor bottom plate of measurement, a piece of aluminium film, aluminium film and measuring chamber inner conducting layer is covered on the surface of solid state track detector to connect by conducting wire with high-pressure modular.When measurement, due to external environment222The half-life period of Rn is longer, can enter measuring chamber by diaphragm, provides voltage to measuring chamber by high-pressure modular, forms high-voltage electrostatic field between the conductive layer and solid state nuclear track detector surface of the entire chamber of measuring chamber, so that it is indoor to enter measurement222Rn positively charged daughter is drifted about to solid state nuclear track detector surface, by using small chamber and solid state nuclear track detector in measurement environment for a long time222Temperature and humidity effect is eliminated when Rn mean concentration, improves detection efficient.

Description

Measurement222The device and method of temperature and humidity effect is eliminated when Rn mean concentration
Technical field
It is especially a kind of same using electrostatic collection and solid state track detector the present invention relates to nuclear radiation detection technical field In pacing amount environment for a long time222The measuring device and measuring method of temperature and humidity effect are eliminated when Rn mean concentration.
Background technique
In surrounding air222Rn is the main source of natural radiation suffered by human body, is to lead to lung to human respiratory radiation The major reason of cancer.Traditional active measuring method is usually then to obtain sky by Method of Energy Spectrum Analysis to air sampling In gas222The concentration of Rn.This method is accurately quick, but can only reflect the data of sampling time section, cannot be put down for a long time Equal data.Solid state nuclear track detector is usually used to measure in air in traditional passive measurement method222Rn is for a long time Mean concentration.Since its is at low cost, it is widely applied.But its detectivity is low, cause statistic fluctuation error compared with Greatly.Utilize electrostatic collection and solid state track detector synchro measure222Rn concentration can be improved detectivity.But electrostatic is received Collection efficiency is affected by temperature and humidity, and detection efficient is caused to be affected by greenhouse degree.
Summary of the invention
It is provided a kind of using electrostatic collection and solid trace the purpose of the present invention is overcoming the above-mentioned insufficient of the prior art In detector synchro measure environment for a long time222The measuring device and measuring method of temperature and humidity effect are eliminated when Rn mean concentration.
The technical scheme is that measurement222The device of elimination temperature and humidity effect when Rn mean concentration, including measuring chamber, Bottom plate, solid state track detector, aluminium film and high-pressure modular.
The entire inner cavity of the measuring chamber is equipped with conductive layer, and siding is equipped with venthole, venthole and external environment It communicates, diaphragm is pasted on venthole.
The bottom plate is equipped with wire column.
Measuring chamber is fixed by screws on bottom plate, and the faying face of measuring chamber and bottom plate is equipped with gasket, and solid trace is visited It surveys device to be pasted on the indoor bottom plate of measurement, a piece of aluminium film is covered on the surface of solid state track detector.
The conducting wire on conducting wire and conductive layer in aluminium film passes through wire column respectively and reaches outside measuring chamber, the conducting wire in aluminium film The cathode of high-pressure modular is connected, the anode of the conducting wire connection high-pressure modular on conductive layer.
In order to eliminate temperature and humidity effect, detection efficient is improved, above-mentioned measuring chamber uses small chamber, chamber height 3-8cm, Chamber volume is 10-50cm3。
Using long-time in above-mentioned measuring device synchro measure environment222The side of temperature and humidity effect is eliminated when Rn mean concentration Method is as follows:
Due to external environment222The half-life period of Rn is longer, can enter measuring chamber by diaphragm, by high-pressure modular to survey It measures room and voltage is provided, form high-pressure electrostatic between the conductive layer and solid state nuclear track detector surface of the entire chamber of measuring chamber , so that it is indoor to enter measurement222Rn positively charged daughter is drifted about to solid state nuclear track detector surface, by using small chamber Room and the solid state nuclear track detector long-time in measurement environment222Temperature and humidity effect is eliminated when Rn mean concentration, improves detection effect Rate.
The further technical solution of the present invention is: when measuring chamber chamber height be 3-8cm, and chamber volume be greater than 50 cm3When, it is measured using a plurality of solid state nuclear track detectors, a plurality of solid state nuclear track detectors are evenly distributed on survey Amount is indoor, the aluminium film being covered on solid state nuclear track detector reached outside measuring chamber from wire column again after being connected by conducting wire and The connection of high-pressure modular cathode.
The quantity of solid state nuclear track detector is determined according to measuring chamber chamber volume size, is in measuring chamber chamber volume 10-50cm3On the basis of, every increase 30-50 cm3Increase a solid state nuclear track detector.
Its measurement method with using a solid state nuclear track detector measurement method compared with, unlike, using plural number A solid state nuclear track detector measures, and measurement process is the same.
Compared with the prior art, the invention has the following features:
Measuring device structure provided by the invention is simple, and measurement process is convenient and efficient, is detected using small chamber and solid state nuclear track Device long-time in measurement environment222Temperature and humidity effect is eliminated when Rn mean concentration, improves detection efficient.
Detailed construction of the invention is further described below in conjunction with the drawings and specific embodiments.
Detailed description of the invention
Attached drawing 1 is the measuring device structural schematic diagram in embodiment one；
Attached drawing 2 is the A-A cross-sectional view of attached drawing 1；
Attached drawing 3 is the measuring device structural schematic diagram in embodiment two.
Specific embodiment
Embodiment one, measurement222Eliminate the device of temperature and humidity effect when Rn mean concentration, including measuring chamber 1, bottom plate 2, solid Body track detector 3, aluminium film 4 and high-pressure modular 7.
The entire inner cavity of the measuring chamber 1 is equipped with conductive layer 1-1, and siding is equipped with venthole 1-2, venthole 1-2 It is communicated with external environment, diaphragm 6 is pasted on venthole 1-2.
The bottom plate 2 is equipped with wire column 2-1.
Measuring chamber 1 is fixed by screws on bottom plate 2, and the faying face of measuring chamber 1 and bottom plate 2 is equipped with gasket 5, solid diameter Mark detector 3 is pasted on the bottom plate 2 in measuring chamber 1, and a piece of aluminium film 4 is covered on the surface of solid state track detector 3.
The conducting wire on conducting wire and conductive layer 1-1 in aluminium film 4 passes through wire column 2-1 respectively and reaches outside measuring chamber 1, aluminium film Conducting wire on 4 connects the cathode of high-pressure modular 7, the anode of the conducting wire connection high-pressure modular 7 on conductive layer 1-1.
In order to eliminate temperature and humidity effect, the detection efficient and sensitivity of solid state nuclear track detector 3, above-mentioned measuring chamber are improved 1 uses small chamber, chamber height 3cm, chamber volume 20cm3。
Using long-time in above-mentioned measuring device synchro measure environment222The side of temperature and humidity effect is eliminated when Rn mean concentration Method is as follows:
Due to external environment222The half-life period of Rn is longer, can enter measuring chamber 1 by diaphragm 6,
Voltage is provided to measuring chamber 1 by high-pressure modular, is visited in the conductive layer 1-1 and solid state nuclear track of the entire chamber of measuring chamber 1 It surveys between 3 surface of device and forms high-voltage electrostatic field, so that into measuring chamber 1222Rn positively charged daughter is visited to solid state nuclear track Survey the drift of 3 surface of device, by using small chamber and solid state nuclear track detector 3 in measurement environment for a long time222Rn mean concentration When eliminate temperature and humidity effect, improve detection efficient.
Embodiment two: compared with embodiment one, unlike, when the chamber height of measuring chamber 1 is 8cm, chamber volume is 200 cm3When, it is measured using six solid state nuclear track detectors 3, six solid state nuclear track detectors 3 are evenly distributed on In measuring chamber 1, the aluminium film 4 being covered on solid state nuclear track detector 3 reaches survey from wire column 2-1 again after connecting by conducting wire Amount room 1 is outer to be connect with 7 cathode of high-pressure modular.
Its measurement method compared with embodiment one, unlike, the present embodiment using six solid state nuclear track detectors 3 come It measures, measurement process is the same.

Claims (5)

1. measurement222The device of temperature and humidity effect is eliminated when Rn mean concentration, it is characterized in that: including measuring chamber, bottom plate, solid diameter Mark detector, aluminium film and high-pressure modular；
The entire inner cavity of the measuring chamber is equipped with conductive layer, and siding is equipped with venthole, and venthole is communicated with external environment, Diaphragm is pasted on venthole；
The bottom plate is equipped with wire column；
Measuring chamber is fixed by screws on bottom plate, and the faying face of measuring chamber and bottom plate is equipped with gasket, solid state track detector It is pasted on the indoor bottom plate of measurement, a piece of aluminium film is covered on the surface of solid state track detector；
The conducting wire on conducting wire and conductive layer in aluminium film passes through wire column respectively and reaches outside measuring chamber, the conducting wire connection in aluminium film The cathode of high-pressure modular, the anode of the conducting wire connection high-pressure modular on conductive layer.
2. measuring device as described in claim 1, it is characterized in that: the chamber height of measuring chamber is 3-8cm, chamber volume is 10-50cm3。
3. measuring device as described in claim 1, it is characterized in that: when the chamber height of measuring chamber is 3-8cm, and chamber volume Greater than 50 cm3When, it is measured using a plurality of solid state nuclear track detectors, a plurality of solid state nuclear track detectors are uniform It is distributed in measuring chamber, the aluminium film being covered on solid state nuclear track detector reaches survey from wire column again after connecting by conducting wire Amount outdoor is connect with high-pressure modular cathode；
The quantity of solid state nuclear track detector is determined according to measuring chamber chamber volume size, is 10- in measuring chamber chamber volume 50cm3On the basis of, every increase 30-50 cm3Increase a solid state nuclear track detector.
4. using long-time in measuring device synchro measure environment as claimed in claim 2222It is eliminated when Rn mean concentration warm and humid The method for spending effect, it is characterized in that: due to external environment222The half-life period of Rn is longer, and measurement can be entered by diaphragm Room provides voltage to measuring chamber by high-pressure modular, in the conductive layer and solid state nuclear track detector table of the entire chamber of measuring chamber High-voltage electrostatic field is formed between face, so that it is indoor to enter measurement222Rn positively charged daughter is to solid state nuclear track detector surface Drift, by using small chamber and solid state nuclear track detector in measurement environment for a long time222It is eliminated when Rn mean concentration warm and humid Effect is spent, detection efficient is improved.
5. using long-time in measuring device synchro measure environment as claimed in claim 3222It is eliminated when Rn mean concentration warm and humid The method for spending effect, it is characterized in that: due to external environment222The half-life period of Rn is longer, and measurement can be entered by diaphragm Room provides voltage to measuring chamber by high-pressure modular, in the conductive layer and solid state nuclear track detector table of the entire chamber of measuring chamber High-voltage electrostatic field is formed between face, so that it is indoor to enter measurement222Rn positively charged daughter is to solid state nuclear track detector surface Drift, by using small chamber and a plurality of solid state nuclear track detectors in measurement environment for a long time222Disappear when Rn mean concentration Except temperature and humidity effect, detection efficient is improved.
CN201811426298.7A 2018-11-27 2018-11-27 Measurement of 222 Device and method for eliminating temperature and humidity effect during Rn average concentration Active CN109541666B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021238348A1 (en) * 2020-05-27 2021-12-02 北京市化工职业病防治院 Radioactive radon and thoron daughter concentration measurement method based on solid state nuclear track

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