Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring <222>Rn and <220>Rn concentration synchronously by two-times etching on single CR-39 piece

A CR-39, synchronous measurement technology, applied in the field of nuclear radiation detection, can solve the problems of complex structure and high cost of CR-39 detector

Active Publication Date: 2016-02-24
HENGYANG NORMAL UNIV
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in synchronous measurements 222 Rn, 220 Rn's CR-39 detector has a complex structure and high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring &lt;222&gt;Rn and &lt;220&gt;Rn concentration synchronously by two-times etching on single CR-39 piece
  • Method for measuring &lt;222&gt;Rn and &lt;220&gt;Rn concentration synchronously by two-times etching on single CR-39 piece
  • Method for measuring &lt;222&gt;Rn and &lt;220&gt;Rn concentration synchronously by two-times etching on single CR-39 piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1, a kind of monolithic CR-39 double etching method synchronous measurement 222 Rn, 220 The Rn concentration method is to etch a single CR-39 resin sheet twice, and use the two readings to obtain 222Rn, 220 Rn concentration. The specific operation steps are as follows:

[0044] A. Etching and reading process:

[0045] Install the CR-39 in a small box 1 to form a CR-39 solid track detector. The small box 1 is a sealed container with a cover, and the small box 1 is provided with a filter membrane with a filter membrane 2-1 Frame 2, the casing of small box 1 can isolate the 222 Rn and 220 The daughters of Rn enter the small box 1, the air 222 Rn and 220 Rn can only enter the small box 1 from the filter membrane 2-1 on the filter membrane frame 2, so that CR-39 is subjected to the air in the small box 1 222 Rn and 220 Irradiation of energetic alpha particles of different energies emitted along the Rn decay chain.

[0046] Put the CR-39 solid track dete...

Embodiment 2

[0072] Embodiment two, a kind of monolithic CR-39 double etching method synchronous measurement 222 Rn, 220 The Rn concentration method is to etch a single CR-39 resin sheet twice, and use the two readings to obtain 222 Rn, 220 Rn concentration. The specific operation steps are as follows:

[0073] A. Etching and reading process:

[0074] Install the CR-39 in a small box 1 to form a CR-39 solid track detector. The small box 1 is a sealed container with a cover, and the small box 1 is provided with a filter membrane with a filter membrane 2-1 Frame 2, the casing of small box 1 can isolate the 222 Rn and 220 The daughters of Rn enter the small box 1, the air 222 Rn and 220 Rn can only enter the small box 1 from the filter membrane 2-1 on the filter membrane frame 2, so that CR-39 is subjected to the air in the small box 1 222 Rn and 220 Irradiation of energetic alpha particles of different energies emitted along the Rn decay chain.

[0075] Put the CR-39 solid track d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for measuring <222>Rn and <220>Rn concentration synchronously by two-times etching on a single CR-39 piece. Etching is carried out on a single CR-39 piece twice and <222>Rn concentration and <220>Rn concentration are obtained synchronously based on reading numbers. The method comprises: a single CR-39 piece is installed in a small box to form a CR-39 solid track detector; the CR-39 solid track detector is placed in ambient air to measure <222>Rn and <220>Rn concentration in the air, wherein the measurement time is T1; after completion of the measurement, etching is carried out on the single CR-39 piece twice, and track values N1 and N2 are read under a microscope; the CR-39 solid track detector is placed in a standard <222>Rn chamber with the concentration of C1 and a standard <220> Rn chamber with the irradiation concentration of C2 respectively, wherein the irradiation time is T2; after completion of irradiation, etching is carried out on the CR-39 resin piece twice and track numbers N'1222, N'2222, N'1220, and N'2220 are read respectively under the microscope; and then calculation is carried out to obtain the <222>Rn concentration and <220>Rn concentration in the environment.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method for synchronously measuring a single piece of CR-39 by two etching methods 222 Rn, 220 Method for Rn concentration. Background technique [0002] CR-39 is the most widely used material for the production of ordinary resin lenses. Applying CR-39 to solid nuclear track detectors can record the tracks of protons, neutrons, alpha particles, heavy ions, fission fragments, etc. It has been widely used in nuclear physics and particle physics research. The irradiated CR-39 solid nuclear track detector is generally chemically etched first, and then observed with an optical microscope. The main factors affecting the etching of CR-39 track sheet are temperature, concentration of etching solution and etching time. The CR-39 detector is widely used in the field of environmental radon measurement due to its low cost, small size, and ability to record the accumu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01T5/02
CPCG01T5/02
Inventor 谭延亮袁红志
Owner HENGYANG NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com