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Radioactive source for stably releasing 220Rn and radiation device including radioactive source

A radiation device and radioactive source technology, applied in the field of radioactive sources, can solve the problems of unsatisfactory scale effect in the core area of ​​the detector, long life, and inability to be placed inside the detection area, etc., to achieve the effects of increasing life, avoiding pollution, and reducing pollution

Pending Publication Date: 2019-05-14
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, these nuclides are solid and have a long life, and cannot be placed inside the detection area when the detector is running, so the calibration effect on the core area of ​​the detector is not ideal.
[0003] The current commercial sources of radon gas are 222 Rn source, although its half-life is only 3.8 days, but the 210 The half-life of Pb can reach 22 years, which brings serious background to the detector

Method used

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  • Radioactive source for stably releasing 220Rn and radiation device including radioactive source
  • Radioactive source for stably releasing 220Rn and radiation device including radioactive source

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Embodiment Construction

[0017] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0018] Please see first figure 1 , 1-In the solid substrate coated with thorium-containing film, the solid substrate can be metal materials such as stainless steel, inorganic non-metallic materials such as glass, or organic materials such as organic glass and PTFE, and the surface of the substrate can be flat or non-planar .

[0019] see figure 2 , the 2-fixed structure uses multiple 1-solid substrates coated with thorium-containing films for stable release 220 The array of Rn radiation sources is fixed as a whole and fixed with the 3-radiation source housing. 3-The sealing flange on the radioactive source shell is airtightly connected with the radioactive source shell, serving as a connection port with the applied load. 3-The radioactive source she...

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Abstract

The invention discloses a radioactive source for stably releasing 220Rn and a radiation device including the radioactive source. The radioactive source is a solid substrate or a basal plate which is plated with a thorium-containing film; the radiation device consists of a radioactive source shell, a fixing structure, a supporting structure and the radioactive source. According to the radioactive source and the radiation device provided by the invention, high-purity 220Rn can be stably and conveniently provided for calibration of an instrument and scales of a particle detector, wherein the content of the 222Rn is relatively low, and a negative effect on using equipment by a long-life decay product of 222Rn can be avoided.

Description

technical field [0001] The invention belongs to the technical field of radioactive sources, and in particular relates to a 220 A radioactive source of Rn and a radioactive device including the radioactive source. Background technique [0002] In rare high-energy physics experiments such as neutrino detection and dark matter detection, it is necessary to use 60 Co. 137 Cs, 55 Fe, 22 Na, 40 The γ-spectrum line produced by the decay of K and other radionuclides is calibrated to more accurately understand various performance parameters of the detector. However, these nuclides are solid and have a long life, and cannot be placed inside the detection area when the detector is running, so the calibration effect on the core area of ​​the detector is not ideal. [0003] The current commercial sources of radon gas are 222 Rn source, although its half-life is only 3.8 days, but the 210 The half-life of Pb can reach 22 years, which brings serious background to the detector. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167
Inventor 张涛季向东
Owner SHANGHAI JIAO TONG UNIV
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