Method of detecting radon and its daughter alpha energy spectrum using atmospheric air pulse ionization chamber

An ionization chamber and pulse technology, applied in the field of nuclear radiation detection, can solve the problems of large detection sensitivity and low cost, and achieve the effects of high detection sensitivity, low cost and large volume

Inactive Publication Date: 2006-06-28
成都理工大学应用核技术与自动化工程学院
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Problems solved by technology

[0004] The object of the present invention is to disclose a device for measuring radon and its progeny α energy spectrum by combining a charge-sensitive amplifier with a normal-pressure air pulse ionization chamber. Low, low, etc., and has the function of α energy spectrum measurement, which solves the problem that the current atmospheric pressure air pulse ionization chamber cannot be used for radon and its progeny α energy spectrum measurement.

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  • Method of detecting radon and its daughter alpha energy spectrum using atmospheric air pulse ionization chamber
  • Method of detecting radon and its daughter alpha energy spectrum using atmospheric air pulse ionization chamber
  • Method of detecting radon and its daughter alpha energy spectrum using atmospheric air pulse ionization chamber

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[0022] Such as figure 1 shown. The atmospheric pressure air pulse ionization chamber of the present invention is a closed cavity, with the sealed ionization chamber as the core, the radioactive gas sample enters the high-voltage electrode 1 cavity of the ionization chamber through the dryer, and the gas sample outlet passes through the sealed air pump and then connects with The radioactive gas sample is connected to form a sealed gas circuit circulation; an excellent conductor collecting electrode 3 is fixed in the cavity, and the signal output of the collecting electrode 3 is directly coupled to the input terminal (SIN_IN) of the charge-sensitive preamplifier, and the linear amplification and pulse conditioning circuit generates The voltage pulse signal whose amplitude is proportional to the energy of the incident α particle, after passing through the output terminal (SIN_OUT) and single-phase connection with the multi-channel pulse amplitude analyzer, the α spectrum of radon...

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Abstract

A method of using constant pressure air pulse ionization chamber to detect Rn and its alpha energy spectrum includes applying a closed cavity as ionization chamber with constant pressure air pulse, leading Rn gas to be detected into cavity by connected through gas nozzle, fixing collection electrode of excellent conductor in cavity as its output and collection signal being coupled to input end of charge sensitive amplifier, connecting voltage pulse signal in direct ratio of amplitude to incoming alpha energy at output end of said amplifier to multichannel analyzer for obtaining Rn alpha energy spectrum.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a method for measuring the alpha energy spectrum of radon and its progeny by using a normal-pressure air pulse ionization chamber. technical background [0002] At present, the existing technology uses atmospheric pressure air pulse ionization chamber as the detector of radon and its progeny, which can only be used for the total measurement of radon and its progeny, but not for the measurement of α energy spectrum, so this kind of detector is used As a measuring device for radon and its progeny, it cannot accurately measure the content of Rn-222 and Rn-220 in the measured object, which seriously limits the research and further exploration of radon and its progeny. [0003] The development of scientific theories and technologies of any discipline must be developed with the help of scientific data of testing methods and the development of testing techniques, so that the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/185G01T1/167G01T1/36
Inventor 方方耿波周伟马英杰王敏周程郑奕挺
Owner 成都理工大学应用核技术与自动化工程学院
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