CN106526648A - Method for measuring gamma-ray absorbed dose of glass solidification - Google Patents
Method for measuring gamma-ray absorbed dose of glass solidification Download PDFInfo
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- CN106526648A CN106526648A CN201610933326.9A CN201610933326A CN106526648A CN 106526648 A CN106526648 A CN 106526648A CN 201610933326 A CN201610933326 A CN 201610933326A CN 106526648 A CN106526648 A CN 106526648A
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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
- G01T1/02—Dosimeters
Abstract
The invention discloses a method for measuring a gamma-ray absorbed dose of glass solidification. A gamma source irradiates a sample for three specific doses, an EPR spectrum of the irradiated sample is tested, a characteristic spectrum of a solidified body is obtained, a characteristic height difference of the characteristic spectrum of the solidified body in different doses is obtained, the characteristic height difference and the radiation dose are fit linearly to obtain a relation therebetween, EPR is used to test an unknown solidified sample to obtain a height difference of the characteristic spectrum, and the tested height difference is substituted into the relation to obtain the irradiation dose of the sample. According to the invention, a function relation between the characteristic spectrum intensity and the absorbed dose can be obtained by sample measurement, and the absorbed dose is measured; and a glass solidified body is a new material, the EPR (Electron Paramagnetic Resonance) method can be used to measure the absorbed dose of glass rapidly.
Description
Technical field
The invention belongs to material gamma ray absorbed dose field of measuring technique, more particularly to a kind of measure glassy solids
The method of gamma ray absorbed dose.
Background technology
The new core that radionuclide is produced after it there is alpha-decay, β decays, be to low-lying level often in high energy level
Transition, gives off γ photons.Nuclear decay and nuclear reaction can produce gamma-rays.Which is the electromagnetic wave that wavelength is shorter than 0.2 angstrom.
Gamma-ray wavelength ratio X-ray is short, so gamma-rays are with the penetration capacity also more eager to excel in whatever one does than X-ray.Gamma ray is frequency
Electromagnetic wave photon higher than 1.5 hundred billion hertz.Gamma ray does not have electric charge and rest mass, therefore with weak compared with alpha-particle and beta-particle
Ionizing power.
Gamma ray has extremely strong penetration capacity and with high-energy.Gamma ray can be inhaled by the atomic nucleus of high atomic number
Receive, such as lead or weary uranium.Measuring method γ photon is not charged, therefore can not measure its energy with magnetic biasing robin, but can be by
NaI or HpGe detect which and measure its energy.Glass solidified body is that following material its composition for cured high-level waste is
Silicate glass.Irradiation damage can cause firming body material character to change in the curing process.
In sum, solidify volume property to change as absorbed dose increase and increase, the absorbed dose of firming body are carried out
In monitoring, the method that there are currently no measurement firming body absorbed dose.
The content of the invention
It is an object of the invention to provide a kind of method for determining glassy solids gamma ray absorbed dose, it is intended to solve
In being monitored to the absorbed dose of firming body at present, the problem that the method for measurement firming body absorbed dose is surveyed is currently there are no.
The present invention is achieved in that a kind of method for determining glassy solids gamma ray absorbed dose, including：By sample
After product are with gamma sources irradiation, the valence link in firming body structure is interrupted, and produces free electron or claims free radical；
In sample plus a magnetic field, the free electron in sample produces a kind of parallel with magnetic field and a kind of and magnetic in magnetic field
Two kinds of field-reversed orientations；And there is two energy level difference Δ E=g β H, wherein g to be bright g-factor, β is Bohr magneton, and H is magnetic
Field intensity；
In outfield, free electron is in low-lying level state；When to sample microwave-excitation, and when meeting h ν=g β H, wherein h
It is Planck's constant, ν is the frequency for exciting microwave, the free electron in sample occurs resonance absorption, transits to height by low-lying level
Energy level；Resonance absorption energy level difference Δ E is equal to the energy of h ν microwave-excitations herein；
The functional relationship of feature spectral intensity and absorbed dose is obtained by sample preparation measurement, realizes measuring absorbed dose.
Further, the method for the measure glassy solids gamma ray absorbed dose specifically includes following steps：
Step one, by sample specific three dosage of gamma sources irradiation, makes doser use range wide enough；
Step 2, by constantly fine setting applied field strengths, measures the absorptance under different magnetic field intensity, is solidified
The characteristic spectrum (EPR spectrums) of body；
Step 3, obtains the feature peak valley difference in height Δ I of firming body under various dose by way of subtracting each other at peak valley, figure
The difference in height at maximum peak valley in spectrum is labeled as Δ I；
Step 4, using the difference in height Δ I and irradiation dose D of linear fit EPR, is absorbed between dosage and difference in height
Relational expression, the relational expression is：
Δ I=11980logD-65871；
Step 5, tests the peak heights that unknown firming body sample obtains characteristic spectrum using EPR；
Step 6, will measure peak valley difference in height Δ I substitutions step 5 and obtains the irradiation dose of sample is obtained in relational expression.
Further, a kind of three described dosage of step are 103Gy, 104Gy, 105Tri- dosage of Gy.
Further, the mode subtracted each other in step 4 is：At peak, Y-axis numerical value deducts Y-axis numerical value at paddy.
The method of the measure glassy solids gamma ray absorbed dose that the present invention is provided, can be obtained by sample preparation measurement
The functional relationship of feature spectral intensity and absorbed dose, so as to realize measuring to absorbed dose；The glass solidified body of the present invention is one
New material is planted, and the absorbed dose of glass can be quickly measured using the method for electron paramagnetic resonance.
Description of the drawings
Fig. 1 is the method flow diagram for determining glassy solids gamma ray absorbed dose provided in an embodiment of the present invention.
Fig. 2 is the electron paramagnetic resonance spectrum of typical radiated by gamma-ray solidify afterwards body sample provided in an embodiment of the present invention
Figure；
Fig. 3 is firming body feature height difference Δ I provided in an embodiment of the present invention and absorbed dose relation matched curve figure.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
The method for determining glassy solids gamma ray absorbed dose provided in an embodiment of the present invention, including：Sample is used
After the irradiation of gamma sources, the valence link in firming body structure is interrupted, and produces free electron；
In sample plus a magnetic field, the free electron in sample produces a kind of parallel with magnetic field and a kind of and magnetic in magnetic field
Two kinds of field-reversed orientations；And there is two energy level difference Δ E=g β H, wherein g to be bright g-factor, β is Bohr magneton, and H is magnetic
Field intensity；
When h ν=g β H are met to sample microwave-excitation, there is resonance absorption in the free electron in sample, be jumped by low-lying level
Adjourn high level；
The functional relationship of feature spectral intensity and absorbed dose is obtained by sample preparation measurement, realizes measuring absorbed dose.
Below in conjunction with the accompanying drawings the application principle of the present invention is explained in detail.
As shown in figure 1, the method for determining glassy solids gamma ray absorbed dose provided in an embodiment of the present invention is concrete
Comprise the following steps：
S101：By sample specific three dosage of gamma sources irradiation, make doser use range wide enough, described three
Individual dosage is 103Gy, 104Gy, 105Gy；
S102：By constantly fine setting applied field strengths, the absorptance under different magnetic field intensity is measured, firming body is obtained
Characteristic spectrum (EPR spectrums)；
S103：By way of subtracting each other at peak valley, (at peak, Y-axis numerical value deducts Y-axis numerical value at paddy) obtains solid under various dose
Change the characteristic peak difference in height Δ I of body；
S104：Using the difference in height Δ I and irradiation dose D of linear fit EPR, it is absorbed between dosage and difference in height and closes
It is formula, the relational expression is：Δ I=11980logD-65871；
S105：The peak heights that unknown firming body sample obtains characteristic spectrum are tested using EPR；
S106：Peak valley difference in height Δ I substitution S104 will be measured to obtain in relational expression, obtaining the irradiation dose of sample.
The difference in height at maximum peak valley in collection of illustrative plates is labeled as Δ I.
Fig. 2 is the electron paramagnetic resonance spectrum of typical radiated by gamma-ray solidify afterwards body sample provided in an embodiment of the present invention
Figure；
Fig. 3 is firming body feature peak valley difference in height Δ I provided in an embodiment of the present invention and absorbed dose relation matched curve
Figure.
The method of the measure glassy solids gamma ray absorbed dose that the present invention is provided, can be obtained by sample preparation measurement
The functional relationship of feature spectral intensity and absorbed dose, so as to realize measuring to absorbed dose；The glass solidified body of the present invention is one
New material is planted, and the absorbed dose of glass can be quickly measured using the method for electron paramagnetic resonance.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (4)
1. it is a kind of determine glassy solids gamma ray absorbed dose method, it is characterised in that the measure glassy solids
The method of gamma ray absorbed dose includes：
By sample with gamma sources irradiation after, the valence link in firming body structure is interrupted, produce free electron；
In sample plus a magnetic field, the free electron in sample produces a kind of parallel with magnetic field and a kind of anti-with magnetic field in magnetic field
To two kinds orientation；And there is two energy level difference Δ E=g β H, wherein g to be bright g-factor, β is Bohr magneton, and H is that magnetic field is strong
Degree；
In outfield, free electron is in low-lying level state；When to sample microwave-excitation, and when meeting h ν=g β H, in sample from
There is resonance absorption by electronics, high level is transitted to by low-lying level, wherein h is Planck's constant, and ν is the frequency for exciting microwave；
The functional relationship of feature spectral intensity and absorbed dose is obtained by sample preparation measurement, realizes measuring absorbed dose.
2. the method for determining glassy solids gamma ray absorbed dose as claimed in claim 1, it is characterised in that the measure
The method of glassy solids gamma ray absorbed dose specifically includes following steps：
Step one, by sample specific three dosage of gamma sources irradiation；
Step 2, by constantly fine setting applied field strengths, measures the absorptance under different magnetic field intensity, obtains firming body
Characteristic spectrum；
Step 3, obtains the characteristic peak difference in height Δ I of firming body under various dose by way of subtracting each other at peak valley；In collection of illustrative plates
Difference in height at maximum peak valley is labeled as Δ I；
Step 4, using the difference in height Δ I and irradiation dose D of linear fit EPR, be absorbed relation between dosage and difference in height
Formula, the relational expression is：
Δ I=11980logD-65871；
Step 5, tests the peak heights that unknown firming body sample obtains characteristic spectrum using EPR；
Step 6, will measure peak valley difference in height Δ I substitutions step 5 and obtains the irradiation dose of sample is obtained in relational expression.
3. the method for determining glassy solids gamma ray absorbed dose as claimed in claim 2, it is characterised in that step one
Three dosage described in kind are 103Gy, 104Gy, 105Tri- dosage of Gy.
4. the method for determining glassy solids gamma ray absorbed dose as claimed in claim 2, it is characterised in that step 4
In the mode subtracted each other be：At peak, Y-axis numerical value deducts Y-axis numerical value at paddy.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6480895A (en) * | 1987-09-24 | 1989-03-27 | Japan Atomic Energy Res Inst | Radiation dosimeter element |
| CN101424615A (en) * | 2008-12-03 | 2009-05-06 | 中国科学院上海硅酸盐研究所 | Detecting method for anti-radiation performance of lead tungstate crystal |
| CN103097912A (en) * | 2010-04-09 | 2013-05-08 | Isp投资公司 | Radiation dosimetry method |
| CN104990877A (en) * | 2015-07-31 | 2015-10-21 | 合肥工业大学 | Method for detecting irradiation dose of shrimp and shellfish peeled aquatic products on basis of multi-spectral imaging technology |
-
2016
- 2016-10-24 CN CN201610933326.9A patent/CN106526648A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6480895A (en) * | 1987-09-24 | 1989-03-27 | Japan Atomic Energy Res Inst | Radiation dosimeter element |
| CN101424615A (en) * | 2008-12-03 | 2009-05-06 | 中国科学院上海硅酸盐研究所 | Detecting method for anti-radiation performance of lead tungstate crystal |
| CN103097912A (en) * | 2010-04-09 | 2013-05-08 | Isp投资公司 | Radiation dosimetry method |
| CN104990877A (en) * | 2015-07-31 | 2015-10-21 | 合肥工业大学 | Method for detecting irradiation dose of shrimp and shellfish peeled aquatic products on basis of multi-spectral imaging technology |
Non-Patent Citations (6)
| Title |
|---|
| M. MOHAPATRA ET.AL: "Electron beam irradiation effects in Trombay nuclear waste glass", 《NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B》 * |
| M. MOHAPATRA ET.AL: "Gamma radiation induced changes in nuclear waste glass containing Eu", 《PHYSICA B》 * |
| V. PUKHKAYA ET.AL: "Study of formation and sequential relaxation of paramagnetic point defects in electron-irradiated Na-aluminosilicate glasses: Influence of Yb", 《JOURNAL OF NON-CRYSTALLINE SOLIDS》 * |
| 王传现等: "干果类辐照食品鉴定的电子自旋共振波谱法研究", 《农产品质量安全与现代农业发展专家论坛论文集》 * |
| 王昆华: "《聚合物近代仪器分析》", 31 December 2000 * |
| 郑勇林等: "《近代物理实验》", 31 December 2011 * |
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Application publication date: 20170322 |