CN109613602A - A kind of method of indium-doped glass measurement neutron - Google Patents
A kind of method of indium-doped glass measurement neutron Download PDFInfo
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- CN109613602A CN109613602A CN201811590250.XA CN201811590250A CN109613602A CN 109613602 A CN109613602 A CN 109613602A CN 201811590250 A CN201811590250 A CN 201811590250A CN 109613602 A CN109613602 A CN 109613602A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/06—Measuring neutron radiation with scintillation detectors
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Abstract
The present invention provides a kind of method of indium-doped glass measurement neutron, the glass scintillator for being mixed with the indium of preset ratio is reacted with incident neutron, the energy loss released is reacted in glass material, the atomic nucleus for making glass material is in excitation state, and when de excitation will launch a certain number of photons；By the optical signal through glass delivery to photomultiplier, the electric signal being converted into is recorded；Electric signal is obtained into neutron DE multiplied by fluence-dose conversion coefficient.Method provided by the invention can be based on glass is low in cost, easy to process, volume is changeable, acid and alkali-resistance is corrosion-resistant, after mixing a certain proportion of phosphide material, a kind of excellent neutron-sensitive material can be provided, the cost of neutron measurement can be reduced, there is preferable n, γ distinguishing ability, ability is well adapted to for adverse circumstances such as high temperature and humidity, corrosivity.
Description
Technical field
The invention belongs to radiometric technique fields, and in particular to a kind of method of indium-doped glass measurement neutron.
Background technique
The main component of glass is SiO2, it is its maximum feature to visible transparent, while good, optical signal declines with transparency
Reduction is widely used in various industries.Glass can not only conduct optical signal, photon can also be emitted under specific condition, while having body
The advantages of product is changeable, low in cost, easy processing, therefore also by the attention of actinometry industry.
The material composition neutron (-detecting) phosphor to neutron-sensitive is mixed in glass, nuclear reaction occurs for these substances and neutron,
It reacts the energy released and the atomic nucleus for making glass material is in excitation state, when de excitation, will launch a certain number of photons, this
A optical signal is recorded after being converted into electric signal through glass delivery to photomultiplier.
Currently, the lithium glass of doping certain amount lithium has been applied in the measurement work of neutron, lithium glass conduct is such as used
The portable Dose Equivalent Ratemeter of detecting element.The isotope that Li can be used for actinometry has Li-6 and Li-7, and wherein Li-7 pairs
Gamma-rays is sensitive, is simply possible to use in γ measurement application；And Li-6 is not only larger with the reaction cross-section of neutron, while also to gamma-rays very
Sensitivity, the period of the day from 11 p.m. to 1 a.m must distinguish the signal of neutron and γ in measurement, but have high energy gamma ingredient and it is γ strong in, because of arteries and veins
Degree of leaping high is very nearly the same and becomes abnormal difficult.If using Li-6 and Li-7 simultaneously, two sets of test equipments can be needed simultaneously, it is right
In portable apparatus, because the limited change of volume weight is more difficult.
Therefore, it is necessary to invent a kind of method of indium-doped glass measurement neutron to solve the above problems.
Summary of the invention
In view of the deficiencies in the prior art, the object of the present invention is to provide a kind of sides of indium-doped glass measurement neutron
Method can reduce the cost of neutron measurement, have preferable n, γ distinguishing ability, for adverse circumstances such as high temperature and humidity, corrosivity
Well adapt to ability.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of method of indium-doped glass measurement neutron, will be mixed with the glass scintillator and incident neutron of the indium of preset ratio
It reacts, reacts the energy loss of releasing in glass material, the atomic nucleus for making glass material is in excitation state, when de excitation
A certain number of photons will be launched；By the optical signal through glass delivery to photomultiplier, the electric signal being converted into is recorded；
Electric signal is obtained into neutron DE multiplied by fluence-dose conversion coefficient.
Further, raw material of the incorporation containing indium generates glass scintillator containing indium in glass material, wherein indium accounts for the indium
The 5%-10% of glass scintillator gross mass.
Further, indium accounts for the 7% of the indium glass scintillator gross mass.
Further, the raw material containing indium is roquesite or sulphur indium iron ore.
Further, also mixed with cerium (Ce) in the glass scintillator containing indium.
Further, the glass scintillator with a thickness of 1-6mm.
Effect of the invention is that method of the present invention, based on glass, low in cost, easy to process, volume can be big
Can it is small, acid and alkali-resistance is corrosion-resistant, after mixing a certain proportion of phosphide material, can provide a kind of excellent neutron-sensitive material, can be with
The cost for reducing neutron measurement, has preferable n, γ distinguishing ability, has well for adverse circumstances such as high temperature and humidity, corrosivity
Adaptability.
Detailed description of the invention
Fig. 1 is the flow diagram of an embodiment of the method for the invention.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
It will the technical scheme of the embodiment of the invention will be described in further detail in conjunction with attached drawing.Obviously, described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, belongs to the scope of protection of the invention.
The main component of glass is SiO2, the reaction cross-section of Si and O and neutron is all smaller, therefore general glass cannot
It is directly used in measurement neutron.(n, γ) capture reaction occurs for chemical element indium (In) and neutron, is truncated into 196b, therefore contain indium
Glass scintillation physical efficiency is for measuring neutron.Specifically, be mainly used in high-throughput neutron measurement environment, as reactor core, after
Processing cell and accident emergency etc..
Although gamma-rays can also interact with it may also be noted that indium is weight indium category, indium and neutron
Reaction energy is up to 6.38 much higher than γ.The reaction of fusion reaction can be higher, and the impulse amplitude that neutron generates is much higher than γ pulse
Highly, it can be easy to come with γ signal distinguishing using amplitude discriminator device, therefore indium-doped material can work well
In mixed radiation field.
Refering to fig. 1, Fig. 1 is the flow diagram of one embodiment of the method for the invention.
A kind of method of indium-doped glass measurement neutron, comprising the following steps:
Step 101: the glass scintillator and incident neutron for being mixed with the indium of preset ratio react, and react the energy of releasing
Amount loss is in excitation state in glass material, by the atomic nucleus for making glass material, and when de excitation will launch a certain number of light
Son.
Step 102: by the optical signal through glass delivery to photomultiplier, recording the electric signal being converted into.
Step 103: electric signal is obtained into neutron DE multiplied by fluence-dose conversion coefficient, due to photon numbers with
The energy that material absorbs is directly proportional, and the reaction of nuclear reaction can be certain, therefore can be by being proportional to the number of number of neutrons optical signal
Measurement neutron.
Specifically, raw material of the incorporation containing indium generates glass scintillator containing indium in glass material.
Indium is mixed in glass material, inevitably results in the decrease of glass light conducting power, but during the purpose of this patent is
Son measurement, it is of less demanding to the light conducting power of glass, as long as therefore indium to be accounted for the 5%- of the indium glass scintillator gross mass
Requirement is just able to satisfy in 10%.
Preferably, indium accounts for the 7% of the indium glass scintillator gross mass.
The raw material containing indium is mineral containing indium.Specifically, such as roquesite or sulphur indium iron ore, do not limit herein
It is fixed.
In a specific embodiment, it will be mixed containing 5% indium with glass material and generate glass scintillator containing indium.Again
The glass scintillator containing indium is reacted with incident neutron, above-mentioned reaction can make Si by energy loss in glass material
Excitation state is in O material, and when de excitation will necessarily release photon, photon numbers are proportional to the energy of loss, i.e. fission reaction
Quantity is also just proportional to incident neutron number, so that the measurement for the neutron fluence realized, can obtain multiplied by fluence-dose conversion coefficient
To Radiation Protection Quantities such as neutron DEs.
In another embodiment, it will be mixed containing 7% indium with glass material and generate glass scintillator containing indium.Again by institute
It states glass scintillator containing indium to react with incident neutron, above-mentioned reaction can make Si and O material by energy loss in glass material
Material is in excitation state, and when de excitation will necessarily release photon, and photon numbers are proportional to the energy of loss, the i.e. quantity of fission reaction,
Also it is just proportional to incident neutron number, so that the measurement for the neutron fluence realized, can be obtained neutron multiplied by fluence-dose conversion coefficient
The Radiation Protection Quantities such as dose equivalent.When indium accounts for the 7% of the gross mass of glass scintillator containing indium, higher neutron measurement not only can guarantee
Efficiency, while there are also higher transparencies, guarantee that photon energy is sent to subsequent light-sensitive device, such as the photocathode of photomultiplier
On, it can preferably realize measurement effect.
In another embodiment, it will be mixed containing 10% indium with glass material and generate glass scintillator containing indium.Again will
The glass scintillator containing indium reacts with incident neutron, and above-mentioned reaction can make Si and O by energy loss in glass material
Material is in excitation state, and when de excitation will necessarily release photon, and photon numbers are proportional to the energy of loss, the i.e. number of fission reaction
Amount, is also just proportional to incident neutron number, so that the measurement for the neutron fluence realized, available multiplied by fluence-dose conversion coefficient
The Radiation Protection Quantities such as neutron DE.
Indium-doped glass ingredient is mainly SiO2+ In can generally mix micro Ce activation, typical indium-doped glass detector
Thickness is generally 1-6mm, and thin then n, γ distinguishing ability of thickness is strong but n low efficiency, and thickness thickness n, γ distinguishing ability is weak but n efficiency
Height can select, it is not limited here according to the concrete condition of measurand.Preferably, indium-doped glass detector is with a thickness of 5mm.
It is different from the prior art, a kind of method of indium-doped glass measurement neutron provided by the invention is at low cost based on glass
It is honest and clean, easy to process, volume is changeable, acid and alkali-resistance is corrosion-resistant, after mixing a certain proportion of phosphide material, can provide a kind of excellent
Neutron-sensitive material, the cost of neutron measurement can be reduced, there is preferable n, γ distinguishing ability, for high temperature and humidity, corrosion
The adverse circumstances such as property well adapt to ability.
It will be understood by those skilled in the art that method of the present invention is not limited to reality described in specific embodiment
Example is applied, specific descriptions above are intended merely to explain the purpose of the present invention, are not intended to limit the present invention.Those skilled in the art
It can derive other implementation manners according to the technical scheme of the present invention, also belong to the scope of the technical innovation of the present invention, it is of the invention
Protection scope is defined by the claims and their equivalents.
Claims (6)
1. a kind of method of indium-doped glass measurement neutron, which is characterized in that
The glass scintillator for being mixed with the indium of preset ratio is reacted with incident neutron, reacts the energy loss of releasing in glass
In glass material, the atomic nucleus for making glass material is in excitation state, when de excitation will launch a certain number of photons；
By the optical signal through glass delivery to photomultiplier, the electric signal being converted into is recorded；
Electric signal is obtained into neutron DE multiplied by fluence-dose conversion coefficient.
2. a kind of method of indium-doped glass measurement neutron according to claim 1, which is characterized in that
Raw material of the incorporation containing indium generates glass scintillator containing indium in glass material, wherein it is total that indium accounts for the indium glass scintillator
The 5%-10% of quality.
3. a kind of method of indium-doped glass measurement neutron according to claim 2, which is characterized in that
Indium accounts for the 7% of the indium glass scintillator gross mass.
4. a kind of method of indium-doped glass measurement neutron according to claim 2, which is characterized in that the raw material containing indium is
Roquesite or sulphur indium iron ore.
5. a kind of method of indium-doped glass measurement neutron according to claim 1, which is characterized in that
Also mixed with cerium (Ce) in the glass scintillator containing indium.
6. a kind of method of indium-doped glass measurement neutron according to claim 1, which is characterized in that the glass scintillator
With a thickness of 1-6mm.
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| CN201811590250.XA CN109613602A (en) | 2018-12-25 | 2018-12-25 | A kind of method of indium-doped glass measurement neutron |
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| CN201811590250.XA CN109613602A (en) | 2018-12-25 | 2018-12-25 | A kind of method of indium-doped glass measurement neutron |
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| US5684847A (en) * | 1994-11-02 | 1997-11-04 | Framatome | Silver-based alloy containing indium and cadmium for the production of neutron-absorber components, and use |
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