CN109297996A - A method of utilizing gamma-ray measurement composite material compositions ratio - Google Patents
A method of utilizing gamma-ray measurement composite material compositions ratio Download PDFInfo
- Publication number
- CN109297996A CN109297996A CN201811228725.0A CN201811228725A CN109297996A CN 109297996 A CN109297996 A CN 109297996A CN 201811228725 A CN201811228725 A CN 201811228725A CN 109297996 A CN109297996 A CN 109297996A
- Authority
- CN
- China
- Prior art keywords
- composite material
- thickness
- component ratio
- surveying
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/095—Gamma-ray resonance absorption, e.g. using the Mössbauer effect
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention devises a kind of method for surveying each component ratio content of composite material using gamma-rays.Experimental study shows that in the composite the proportional amount of different material is in different linear relationships to the gamma-ray attenuation degree of different-energy from it, i.e., single substance does not change the absorption coefficient of ray because measured object contains many kinds of substance in the composite.Based on this principle, the overall thickness equations simultaneousness of the attenuation equation of radioactive source measurement composite material and material is shown to the mass thickness of each ingredient, the ratio by the mass thickness of each ingredient and gross mass thickness is each component ratio.
Description
Technical field
The invention belongs to Nuclear Physics fields, are related to a kind of utilization gamma-rays survey composite material (only containing 2 kinds of materials)
The method of each component ratio.
Background technique
The analysis of material composition proportion measurement has very important application in engineering technology, and material composition ratio tends to instead
Therefore how film projector tool processability index, all various aspects such as fault in material accurately, conveniently measure each component ratio of object
It is as important to engineer application etc..Under some rugged environments, such as the just molding steel content of steel rolling mill, poured in building
The interior change etc. of rail in quality and natural calamity when cement, these all to we with traditional approach measurement of species at
Point content brings certain difficulty, and utilizing kernel method is usually a kind of fast and convenient solution.
The relatively common X-ray that has detects for patient's in hospital, i.e., the number of the different tissues of human body is passed through by X-ray
Amount is different and radiography, convenient for diagnosis illness.But the X-ray object bigger for material density, penetration capacity is weaker, so
Application in engineering has many limitations.Energy of γ ray is higher, can just make up the deficiency of this respect, has relatively good
Penetration capacity, it should have good application prospect in engineering.Currently, the time that nuclear technology thickness measuring is carried out is not long, at certain
A little aspect applications just start to spread out research, and the data for passing through different materials for ray is also less.The present invention is exactly base
In the summary of the invention that this idea is carried out.
Summary of the invention
The purpose of the present invention is to solve under normal circumstances, it is not difficult to by high accuracy analysis instrument conventional method
The problem of measuring composite material (when only containing 2 kinds of materials) each component ratio.
The object of the present invention is achieved like this:
A method of measurement each component ratio of composite material, it includes the following steps:
1. determining 2 kinds of ingredients of composite material, the pure material of the known quality thickness R of each material is found respectively, and measure compound
The mass thickness of material.
2. adjusting device, after steady operation, material is placed between scintillation detector and radioactive source, it is determined respectively
When measure, obtain its energy spectrum diagram.
3. the full energy peak of gained energy spectrum diagram counts in pair measurement, and then by calculating, obtains the absorption system of pure material
Number.
4. pure material in step 2 is replaced with composite material to be measured, measured using device, obtains its attenuation equation.
5. the composite material attenuation equation measured and thickness equation simultaneous are obtained each quality of materials thickness, and then find out
Each component ratio of composite material.
In the above-mentioned methods, with mass thickness Rm(g/cm2) indicate absorbed thickness, to eliminate the influence of density.
In the above-mentioned methods, radioactive source, collimating aperture, scintillation detector center be located in a straight line.
In the above-mentioned methods, high pressure and amplification factor need to be adjusted, keep the maximum impulse amplitude of radioactive source power spectrum big as far as possible and
It is no more than the analyst coverage of multichannel analyzer again.
In the above-mentioned methods, in order to enter the gamma-rays number of detector under the conditions of whens calculating etc., to obtained power spectrum
Photopeak carries out integral counting.
In the above-mentioned methods, in order to reduce the interference in surveyed photopeak there are environmental exact details and Compton scattering, so
Need to subtract surveyed photoelectricity peak area the counting of background, to obtain actual count.
In the above-mentioned methods, because attenuation equation is unrelated with the distribution of each ingredient of composite material, therefore the mass thickness of each ingredient
Ratio with gross mass thickness is each component ratio.
Detailed description of the invention
Fig. 1 is the schematic device for measuring material substance thickness.
In figure:
The radioactive source 2- measured material 3- scintillation detector of 1- collimation shielding
4- high voltage power supply 5- multichannel analyzer
Specific embodiment
1. determining 2 kinds of ingredients of composite material, the pure material of the known quality thickness R of each material is found respectively, and measure compound
The mass thickness of material.
2. regulation experiment device is located in a straight line the center of radioactive source 1, collimating aperture, scintillation detector 3.It adjusts
The high pressure and amplification factor of high voltage power supply 4 keep the maximum impulse amplitude of radioactive source power spectrum big as far as possible and are no more than multiple tracks pulse
The analyst coverage of analyzer 5.After steady operation, no material and placement are tested respectively between scintillation detector and radioactive source pure
Material 2 is timed measurement, and measurement data reaches computer for data are analyzed by multichannel analyzer 5, obtains its energy spectrum diagram.
3. in order to enter the gamma-rays number of detector 3 under the conditions of whens calculating etc., so needing the light of obtained energy spectrum diagram
Electric peak carries out integral counting.Because there are the interference of environmental exact details and Compton scattering in surveyed photopeak, need to institute
The counting that photoelectricity peak area subtracts background is surveyed, that is, takes both sides peak valley 1, r, 1 to the road r all step-by-step countings are added, background
It is deducted with straight line, then remainder is counted, to obtain actual count.
4. according to formula
In formula, μmFor material absorption co-efficient, ρ is density of material, N2For pure material counting, N1It is counted for no material, R2For pure material
Mass thickness, R1It is 0.
Calculate the absorption coefficient of pure material.It repeats the above steps, the absorption coefficient of 2 kinds of ingredients in composite material can be obtained
μ1、μ2。
5. being counted N with identical radioactive source measurement composite material (only containing 2 kinds of materials) to its energy spectrum diagram, it can be obtained to obtain
Attenuation equation is,
lnN1- lnN=μ1R1/ρ1+μ2R2/ρ2
In formula, N1It is counted for no material.
And each quality of materials thickness and composite material mass thickness meet equation:
R1+R2=R
In formula, R1、R2The mass thickness of respectively 2 kinds materials, R are the mass thickness of composite material.
Above-mentioned two formula simultaneous can be found out to the mass thickness R of each substance.
Because attenuation equation is unrelated with the distribution of each ingredient of composite material, therefore the mass thickness of each ingredient and gross mass thickness
Ratio is each component ratio.Therefore, each component ratio of composite material are as follows:
ω n=Rn/R.
Claims (7)
1. a kind of method for surveying each component ratio of composite material using gamma-rays, it is characterised in that the step of measurement:
(1) 2 kinds of ingredients for determining composite material, find the pure material of the known quality thickness R of each material respectively, and measure compound
The mass thickness of material.
(2) regulation experiment device after steady operation, places (1) described material, to its point between scintillation detector and radioactive source
It is not timed measurement, obtains its energy spectrum diagram.
(3) full energy peak of gained energy spectrum diagram in (2) is counted, and then by calculating, obtains the suction for the material that (2) are placed
Receive coefficient.
(4) material in (2) is replaced with into composite material to be measured, measured, obtain its attenuation equation.
(5) by the composite material attenuation equation measured in (4) and thickness equation simultaneous, each quality of materials thickness, Jin Erqiu are obtained
Each component ratio of composite material out.
2. the method according to claim 1 for surveying each component ratio of composite material, which is characterized in that quality in step (1)
Thickness Rm(g/cm2) indicate absorbed thickness, to eliminate the influence of density.
3. the method according to claim 1 for surveying each component ratio of composite material, which is characterized in that step (2) electricity radiation
Source, collimating aperture, scintillation detector center be located in a straight line.
4. the method according to claim 1 for surveying each component ratio of composite material, which is characterized in that step needs to adjust in (2)
High pressure and amplification factor are saved, keep the maximum impulse amplitude of radioactive source power spectrum big as far as possible and is no more than point of multichannel analyzer
Analyse range.
5. the method according to claim 1 for surveying each component ratio of composite material, which is characterized in that be in step (3)
The gamma-rays number for entering detector under the conditions of whens calculating etc., to the photopeak progress integral counting of obtained power spectrum.
6. it is according to claim 1 survey each component ratio of composite material method, which is characterized in that in step (3) in order to
There are the interference of environmental exact details and Compton scattering in the surveyed photopeak of reduction, so needing to subtract surveyed photoelectricity peak area this
The counting at bottom, to obtain actual count.
7. the method according to claim 1 for surveying each component ratio of composite material, which is characterized in that in step (5), decaying
Equation is unrelated with the distribution of each ingredient of composite material, therefore the ratio of the mass thickness of each ingredient and gross mass thickness is each ingredient
Ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811228725.0A CN109297996A (en) | 2018-10-12 | 2018-10-12 | A method of utilizing gamma-ray measurement composite material compositions ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811228725.0A CN109297996A (en) | 2018-10-12 | 2018-10-12 | A method of utilizing gamma-ray measurement composite material compositions ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109297996A true CN109297996A (en) | 2019-02-01 |
Family
ID=65158320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811228725.0A Pending CN109297996A (en) | 2018-10-12 | 2018-10-12 | A method of utilizing gamma-ray measurement composite material compositions ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109297996A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380879A (en) * | 2020-03-31 | 2020-07-07 | 中国计量科学研究院 | Mass attenuation measuring method and device based on gamma ray total energy peak |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1126316A (en) * | 1995-06-23 | 1996-07-10 | 哈尔滨工业大学 | On-line measuring method and used unit for respectively measuring each content of two-component substance |
| WO2013017879A1 (en) * | 2011-08-01 | 2013-02-07 | Kromek Limited | Method for the radiological investigation of an object |
| CN105806856A (en) * | 2014-12-30 | 2016-07-27 | 清华大学 | Dual-energy ray imaging method and system |
-
2018
- 2018-10-12 CN CN201811228725.0A patent/CN109297996A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1126316A (en) * | 1995-06-23 | 1996-07-10 | 哈尔滨工业大学 | On-line measuring method and used unit for respectively measuring each content of two-component substance |
| WO2013017879A1 (en) * | 2011-08-01 | 2013-02-07 | Kromek Limited | Method for the radiological investigation of an object |
| CN105806856A (en) * | 2014-12-30 | 2016-07-27 | 清华大学 | Dual-energy ray imaging method and system |
Non-Patent Citations (4)
| Title |
|---|
| 朱桐等: "《核药学基础》", 31 July 1992, 上海医科大学出版社 * |
| 李涛等: "能谱技术测量铝块厚度的实验方法", 《物理教学探讨》 * |
| 陈宝玲等: "《近代物理实验》", 31 August 2007, 哈尔滨地图出版社 * |
| 陈英琦等: "用γ射线能谱法测量材料的吸收系数和厚度", 《同位素》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380879A (en) * | 2020-03-31 | 2020-07-07 | 中国计量科学研究院 | Mass attenuation measuring method and device based on gamma ray total energy peak |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Singh et al. | New Precision Measurement of the H e 3 (H e 4, γ) B e 7 Cross Section | |
| Tsuda et al. | Characteristics and verification of a car-borne survey system for dose rates in air: KURAMA-II | |
| CN111913205A (en) | Nuclear emergency multifunctional portable radiation monitoring system and monitoring method | |
| CN116381772A (en) | Real-time energy response correction method, system and terminal for dose rate meter | |
| Baek et al. | Optimization of large-angle pinhole collimator for environmental monitoring system | |
| CN109297996A (en) | A method of utilizing gamma-ray measurement composite material compositions ratio | |
| CN103474323B (en) | A kind of ionization chamber of direct measurement personal dose equivalent | |
| JPH01134291A (en) | Scintillation type dose rate meter | |
| Umezawa et al. | Gamma-ray spectrometric determination of isotopic ratios of plutonium | |
| De Vismes et al. | Towards absolute activity measurements by ionisation chambers using the PENELOPE Monte-Carlo code | |
| Holt et al. | High-energy gamma-ray dosimetry: Experimental measurements at a nuclear power station | |
| Bahar‐Gogani et al. | Assessment of the relative dose distribution around an line source using a liquid ionization chamber | |
| Volkovitsky et al. | Absolute 60Co characterization based on gamma–gamma coincident detection by two NaI (Tl) detectors | |
| Gold | Meson dosimetry for the natural environment | |
| Biswas et al. | Measurement of number albedo of backscattered photons for tin and lead | |
| Sarma et al. | Photoelectric cross-sections of light elements and compounds at low photon energies | |
| Payne et al. | Diamond dose rate detector testing at KURRI-A joint UK-Japan research project-17126 | |
| Csedreki | Experimental conditions for cross section measurements for analytical purposes | |
| Kurudirek et al. | Robust determination of mass attenuation coefficients of materials with unknown thickness and density | |
| Murty et al. | Elastic scattering of 1.12 MeV gamma rays | |
| Berndt et al. | Experimental determination of the self-absorption factor for MTR plates by passive gamma spectrometric measurement | |
| Gardner et al. | Optimization of density and moisture content measurements by Nuclear Methods | |
| JPH01134288A (en) | Gas counter tube type dose rate meter | |
| Brettner-Messler et al. | Results of monte Carlo calibrations of a low energy germanium detector | |
| Borak | Philadelphia, PA June 28-July 1, 1999 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190201 |