CN106855522B - White light neutron imaging method and the material composition lossless detection method for using it - Google Patents
White light neutron imaging method and the material composition lossless detection method for using it Download PDFInfo
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- CN106855522B CN106855522B CN201611270697.XA CN201611270697A CN106855522B CN 106855522 B CN106855522 B CN 106855522B CN 201611270697 A CN201611270697 A CN 201611270697A CN 106855522 B CN106855522 B CN 106855522B
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- 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
- G01N23/04—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 forming images of the material
- G01N23/05—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 forming images of the material using neutrons
Abstract
A kind of white light neutron imaging method, comprising steps of neutron source emits pulsed neutron beam and records launch time；Detector direct impulse neutron beam obtains the position of neutron and arrival time and is transferred to processing unit；Processing unit obtains the energy information of neutron according to the arrival time of neutron and the launch time of record, is grouped to obtain two-dimentional Neutron flux distribution by energy to neutronIt repeats the above steps, obtains placing two-dimentional Neutron flux distribution when sampleAccording toValue and energy grouping information generate have neutron energy information neutron transmission image.A kind of method for separately proposing non-destructive testing material composition, rebuilds three-dimensional spatial information using the location information of different angle acquisition and obtains the transmission information of space cell lattice point in conjunction with energy information, this value and atomic nucleus database are compared to the composition of determining material.The present invention can be accurately determined the composition of material under lossless case, and the neutron energy widest range of measurement can be covered from eV to 100,000,000 eV.
Description
Technical field
The invention belongs to field of non destructive testing, relate more specifically to a kind of white light neutron imaging method and the material using it
Form lossless detection method.
Background technique
Conventional neutron imaging device generallys use accelerator fission neutron source or pile neutron source, is received using scintillation screen
All incident neutrons, therefore its imaging process does not distinguish particle energy, institute is actually a kind of various energy neutrons at image
The image that stacks up of transmission distribution, it is difficult to profound parsing is carried out to image, also just can not be to sample structure and ingredient
Make further profound analysis.
To solve the above-mentioned problems, in recent years to determine that neutron energy gradually rises as the neutron photography of target research.It is logical
Cross the energy information that neutron is obtained using impulse type accelerator neutron generator and flight time measurement, by neutron by institute after sample at
Image further refine, respectively obtain the neutron transmission picture of different-energy section；Then, recycle material to different-energy
The action section of neutron is different, the preliminary composition for inferring material.As shown in Figure 1, the elements such as hydrocarbon oxygen have in fast region
Significant RESONANCE ABSORPTION structure.The technology is commonly referred to as fast neutron resonance image-forming, and corresponding neutron energy range is 1-10MeV.
There are two types of implementation method in terms of neutron resonance imaging: a kind of method is using quasi monoenergetic neutrons beam, e.g., 2002
The quasi monoenergetic neutrons beam being angularly distributed is reacted in Chen Gongyin of Massachusetts science and engineering et al. proposition using D-D, and to sample
Product are imaged point by point, obtain a series of transmission image of energy points, however the neutron energy that this method will one by one to wide energy range
Amount measures, and efficiency is extremely low, can only embody the fast neutron photograph with power spectrum resolution in elemental analysis and field of safety check
Value；Another method be the neutron or coherent signal of wider power spectrum are sorted, such as Israel development Trion system
It is sorted indeed through the image for adding the image amplifier of time window to generate neutron.The method is compared to quasi- Dan Nengzhong
Beamlet is improved the utilization efficiency of line using sorting schemes, shortens imaging time, and 4-8 fixed energies point may be implemented
Image Acquisition；But the program still only screens the time of image, and indirectly measurement single particle event and the party
Since beam intensity is low, the Flight Length of neutron correspondingly shortens case, therefore the energy covered by the neutron that time window intercepts
It is still very wide to measure section, material information can not be obtained by Resonance Peak Analysis, be that mechanically rotation is adopted additionally, due to the program
Collection, Image Acquisition low efficiency are unsatisfactory for practical application request.
Summary of the invention
Based on problem above, it is a primary object of the present invention to propose a kind of white light neutron imaging method and non-destructive testing material
The method for expecting composition, for solving at least one of above technical problem.
To achieve the goals above, as one aspect of the present invention, the invention proposes a kind of white light neutron imaging sides
Method, comprising the following steps:
Step 11, impulse type accelerator neutron generator emit the pulsed neutron beam of wide power spectrum and record launch time；
Step 12, detector detect and measure pulsed neutron beam, obtain position and the arrival time of each neutron, and will be every
The position of a neutron and arrival time are transferred to processing unit；
Step 13, processing unit obtain the energy of the neutron according to the arrival time of each neutron and the launch time of record
Information is grouped all neutrons by energy, and obtains the neutron flux at different location according to the location information of neutron
Step 14 places sample between impulse type accelerator neutron generator and detector, repeats step 11-13, is put
Neutron flux when setting sample at different locationAccording to instituteRatio and energy grouping information when placing sample it is raw
At a series of continuous neutron transmission images with neutron energy information.
Further, above-mentioned impulse type accelerator neutron generator is based on large-scale spallation neutron target or based on the small of acceleration deuterium beam
Type high current linear accelerator neutron source.
Further, the neutron energy range that above-mentioned impulse type accelerator neutron generator provides is from eV to hundred MeV.
Further, above-mentioned detector is array type detector, by neutron probe array, photoelectric converter and electronics
Read-out device composition.
Further, above-mentioned neutron linear transducer array is formed by more neutron probe regular arrays, the survey of neutron probe array
Amount range and the energy range of pulsed neutron source match.
Further, above-mentioned neutron probe is made of scintillator and conduction optical fiber, and scintillator receives neutron and generates flashing
Light, scintillation light is through conduction fiber optic conduction to photoelectric converter.
Preferably, above-mentioned scintillator is fast scintillator, is capillary type liquid scintillator, plastic scintillant, boracic sudden strain of a muscle
Bright body or lithium glass.
Further, above-mentioned neutron linear transducer array receives the neutron in detection energy range in single pulse.
Further, above-mentioned electronics read-out device be used to measure neutron probe array detection in each pulse it is all in
The arrival time of son and location information, and the arrival time of all neutrons of measurement and location information are transmitted to processing unit.
To achieve the goals above, as another aspect of the present invention, the invention proposes a kind of nothings of material composition
Detection method is damaged, using above-mentioned white light neutron imaging method, material sample is located on rotatable platform, comprising the following steps:
Step 21, rotation are located at the sample on rotatable platform, obtain different angle using white light neutron imaging method and place
Neutron flux when sample at different location, a series of continuous neutrons with neutron energy information for obtaining different angle are saturating
Penetrate image；
Step 22, processing unit are according to a series of continuously with the neutron transmission figures of neutron energy information of different angle
Picture obtains the transmission information of space cell lattice point using cross sectional reconstruction algorithm；
Step 23, processing unit by the total cross-section data of the transmission information of space cell lattice point and nuclear data depositary Radionuclide into
Row comparison, obtains the composition of material.
The method of white light neutron imaging method proposed by the present invention and non-destructive testing material composition, with other fast neutron radiographies
Method is compared, and is had the advantages that
1, white light neutron imaging method image taking speed proposed by the present invention is fast, can measure all energy including low energy region simultaneously
The neutron of section is measured, data cumulative efficiency is high；
2, the neutron probe array in white light neutron imaging method of the invention can measure single neutron, and be owned
The position of neutron and energy information can be obtained detailed a series of continuously in neutron energy information through the processing unit
Sub- transmission image；
3, the method that white light neutron imaging method combination CT technology of the invention forms non-destructive testing material composition, the method
The atomic nucleus feature of available specimen material is compared with atomic nucleus database using it, then can uniquely determine sample
Nucleic composition；
4, in the case where pulsed neutron source and neutron flying distance meet high energy resolution, this method be may be implemented to sample
From gently to the resolution of all nucleic of weight in product；
5, the method that imaging method proposed by the present invention and non-destructive testing material form can be used for safety inspection, historical relic is examined
The numerous areas such as Gu, new energy, new material.
Detailed description of the invention
Fig. 1 is response time curve of the liquid scintillator used in one embodiment of the invention to fast neutron；
Fig. 2 is the neutron total cross-section of several elements and the graph of relation of projectile energy；
Fig. 3 (a) is the schematic device that the white light neutron imaging method that one embodiment of the invention proposes uses；
Fig. 3 (b) is the neutron probe array of detector array in Fig. 3 (a) and the structural schematic diagram of conduction optical fiber, wherein visiting
Head uses capillary liquid scintillator；
Fig. 3 (c) is the neutron motion schematic diagram of device shown in Fig. 3 (a)；
Fig. 4 is that one embodiment of the invention proposes93NbResonance peak structure total cross-section and incident neutron energy relationship
Curve graph；
Fig. 5 is the principle for the white light neutron imaging method combination CT technology detection material composition that one embodiment of the invention proposes
Schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
The invention discloses a kind of white light neutron imaging method, the white light neutron refers to comprising from eV to tens or even hundred
The continuum of million eV and the neutron beam with pulse timing structure, method includes the following steps:
Step 11, impulse type accelerator neutron generator emit the pulsed neutron beam of wide power spectrum and record launch time；
Step 12, detector detect and measure pulsed neutron beam, obtain position and the arrival time of each neutron, and will be every
The position of a neutron and arrival time are transferred to processing unit；
Step 13, processing unit obtain the energy of the neutron according to the arrival time of each neutron and the launch time of record
Information is grouped all neutrons by energy, and obtains the neutron flux at different location according to the location information of neutron
Step 14 places sample between impulse type accelerator neutron generator and detector, repeats step 11-13, is put
Neutron flux when setting sample at different locationAccording to instituteRatio and energy grouping information when placing sample it is raw
At a series of continuous neutron transmission images with neutron energy information.
Above-mentioned detector is array type detector, by neutron probe array, photoelectric converter and electronics read-out device
Composition, wherein neutron probe array is formed by more neutron probe regular arrays, the measurement range and pulse of neutron probe array
The energy range of neutron source matches.
Preferably, above-mentioned neutron probe is made of scintillator and conduction optical fiber, and scintillator receives neutron and generates scintillation light,
Scintillation light is through conduction fiber optic conduction to photoelectric converter.
Preferably, above-mentioned scintillator is fast scintillator, can be capillary type liquid scintillator, plastic scintillant, boracic
Scintillator or lithium glass.
Above-mentioned neutron linear transducer array receives the neutron in measurement energy range in single pulse, and measures neutron one by one
Arrival time and position.
Above-mentioned electronics read-out device is used to measure the arrival of all neutrons of neutron probe array detection in each pulse
Time and location information, and the arrival time of all neutrons of measurement and location information are transmitted to processing unit.
Above-mentioned impulse type accelerator neutron generator is the large-scale spallation neutron target based on high power proton precessional magnetometer, pulse weight
Complex frequency be it is several to tens Hz, proton beam energies in 500MeV or more, or for based on accelerate deuterium beam small-sized high current straight line add
The neutron source of fast device, pulse recurrence frequency are several to tens kHz.Wherein practice shooting generation pulsed neutron by appropriate slowing down shape
It is irradiated on sample after beam-based and suitable distance at the wide power spectrum neutron in eV-MeV energy area.
Wherein it is possible to the launch time of neutron is obtained using different methods, the time practiced shooting such as proton beam or deuterium beam.?
In some cases, it also can use scintillation detector while the association gamma that detection comes from neutron source, these association gammas be complete
It can reflect the launch time of neutron, they are more early than neutron to arrive detector, therefore the arrival time that also can use association gamma is anti-
Push away the launch time of neutron beam.
Different scintillators can be used according to the difference of neutron energy range to cover the extremely wide energy of white light neutron in above-mentioned detector
Area, the position of detector measurement transmission neutron and arrival time, neutron location distribution information will be used to provide the letter of sample structure
Breath, arrival time mutually tie with beam burst target practice time (launch time recorded) provided by impulse type accelerator neutron generator
Close and the flight time of neutron be provided, and the flight time of neutron with neutron energy be it is completely corresponding, in this way and can provide
The information of sample nuclide composition.For large-scale spallation neutron target, neutron fluence rate is very high, needs longer flying distance to reduce
Moment neutron density on detector, longer flying distance are also beneficial to the accurate survey of fast neutron and middle low energy neutron energy
Amount.For small neutron source, neutron fluence rate is not high, and sample and detector should be placed close to neutron-producing target, such as 3-10 meters, because adopting
It is RF linear accelerator, the micropulse structure of deuterium beam can guarantee the neutron time of flight resolution ratio control of 1-10MeV
In a few percent, so as to differentiate the formant of light nucleus element.
Why above-mentioned detector is array type detector, is because using the neutron beam of burst pulse, neutron passes through sample
The moment fluence rate reached on detector is very high, and needing could be same using the array type that the small probe unit of Fast Time Response forms
When measure position and the temporal information of each neutron.For large-scale spallation neutron target, itself has good time structure, weight
Complex frequency is tens Hz, and tens ns of proton pulse width, flying distance is longer, is easier to realize the flight time of single neutron
Detection；And for small linear accelerator deuterium neutron source, it needs to carry out accelerator special setting, such as uses line chopper
Most lines in the long beam burst of ms magnitude are divided into many sections to dispose, make line with several~tens kHz's
Macro pulse structure both reduces shielding requirements to reduce the intensity of neutron source, is easy to use, is also beneficial to the flight of single neutron
The detection of time method.
Why can according to the difference of neutron energy range using the one group or two groups detector with different scintillators, be because
Fast neutron (hundred keV to tens MeV energy area) and middle low energy neutron energy area (eV- hundred keV energy area) are measured simultaneously currently without effective
Detector.The effective ways of measurement fast neutron are using the fast scintillation detector with shorter pulse times structure, as liquid dodges
Bright body EJ-301, as shown in Figure 1, the die-away time of liquid scintillator is generally 3-5ns, it is small to the time response of incident neutron
In 100ns, and to the time width < 20ns of the fast composition of the signal pulse of incident neutron, using electronics read-out device measure into
The pulse signal for hitting sub- generation extracts arrival time of the most fast position of the pulse signal rising front as neutron, error
Range is less than 3ns.The measurement error of neutron energy depends on time error and total flight time namely time error, neutron
Thus energy and flying distance can calculate corresponding energy resolution, for 2.07MeV fast neutron fly 76 meters under conditions of its
Energy resolution is 3.2keV, this energy resolution is enough to portray as a relatively narrow formant (FWHM=such as C-12 nucleic in Fig. 2
12.3keV), therefore can be by whether containing the nucleic in the method resolved materials of resonance spectrum.
Middle low energy neutron can equally be used using corresponding scintillator (scintillator, the lithium glass of such as boracic -10)
The formant of heavy element in resolution, the formant of middle heavy element is usually in a few keV~eV magnitudes, as Fig. 4 is93NbFormant
Structure, since the flying speed of middle low energy neutron is slow, total flight time is long, energy resolution will be than above-mentioned fast-neutron range more
Height, therefore equally also meet the formant testing requirements of these nucleic.
The above-mentioned neutron transmission image with neutron energy information is the space two-dimensional distribution map with Continuous Energy feature
Picture.Since neutron probe has certain probability to measure the neutron beaten on it, need to exist to probe in detector preparation process
The neutron detection efficiency curve in different energy areas carries out scale.In view of the heterogeneity of neutron beam spot at sample, meter can be passed through
The ratio between the neutron flux for calculating after sample is placed and placing each position in preceding detector plane, can be obtained the accurate of specimen material
Neutron transmission image can obtain one group of transmission image with energy resolution in conjunction with flight time measurement in the present invention.
Above-mentioned white light neutron imaging method combination CT technology can obtain the neutron cross section information of each space lattice of sample,
This information is exactly the atomic nucleus feature of specimen material, and material can be uniquely determined by being compared using it with atomic nucleus database
The nuclide composition of material, therefore this is a kind of completely new nondestructive material analysis method.
Based on above-mentioned white light neutron imaging method, another aspect of the present invention discloses a kind of non-destructive testing side of material composition
Method, the material are located on rotatable platform, comprising the following steps:
Step 21, rotation are located at the sample on rotatable platform, obtain different angle using white light neutron imaging method and place
Neutron flux when sample at different location, a series of continuous neutrons with neutron energy information for obtaining different angle are saturating
Penetrate image；
Step 22, processing unit are according to a series of continuously with the neutron transmission figures of neutron energy information of different angle
Picture obtains the transmission information of space cell lattice point using cross sectional reconstruction algorithm；
Step 23, processing unit by the total cross-section data of the transmission information of space cell lattice point and nuclear data depositary Radionuclide into
Row comparison, obtains the composition of material.
Above-mentioned rotation is located at the sample on rotatable platform, then can obtain the imaging results of different angle, processing unit benefit
The transmission information of space cell lattice point can be obtained with cross sectional reconstruction algorithm (i.e. so-called CT technology).In image analysis, adopt
Different constituents are marked with different colours, and are compared with the total cross-section data of nuclear data depositary Radionuclide, it can be intuitively
The three-dimensional structure and material species for obtaining sample form.
White light neutron imaging method proposed by the present invention is described in detail below by way of specific embodiment.
Embodiment
As shown in Fig. 3 (a)~3 (c), the present embodiment provides a kind of white light neutron imaging methods, and the neutron is by impulse type
It is transferred to detector after accelerator neutron generator transmitting and transmission sample, method includes the following steps:
Step 11, impulse type accelerator neutron generator emit the pulsed neutron beam of wide power spectrum and record launch time；
Step 12, detector detect and measure pulsed neutron beam, obtain position and the arrival time of each neutron, and will be every
The position of a neutron and arrival time are transferred to processing unit；
Step 13, processing unit obtain the energy of the neutron according to the arrival time of each neutron and the launch time of record
Information is grouped all neutrons by energy, and obtains the neutron flux at different location according to the location information of neutron
Step 14 places sample between impulse type accelerator neutron generator and detector, repeats step 11-13, is put
Neutron flux when setting sample at different locationAccording to instituteRatio and energy grouping information when placing sample it is raw
At a series of continuous neutron transmission images with neutron energy information.
Shown in method equipment therefor such as Fig. 3 (a) that the present embodiment proposes, wherein detector by neutron probe array, it is mostly positive
Pole photomultiplier tube (PMT), electronics read-out device composition, wherein neutron probe array is made of multiple neutron probes, each
Neutron probe includes scintillator and conduction optical fiber composition.For fast neutron, scintillator uses optical fiber scintillator (capillary array liquid
Body scintillator situation is similar), in periodically densely arranged, the signal of every conduction optical fiber corresponds to subsequent mostly positive neutron probe
One anode of pole photomultiplier tube (such as shore pine H9500).Shown in structure such as Fig. 3 (b) of optical fiber scintillator and conduction optical fiber, light
Fine scintillator detects neutron incidence event for generating blinking light；Conduct optical fiber using high-NA (NA >=
0.5), the identical multimode fibre of outer diameter, so that conduction optical fiber matches substantially with the critical angle of both optical fiber scintillators, the two is used
All -fiber connection guarantees the effective collection and conduction of signal light.Wherein conduction optical fiber is coated with one layer high Z protective layer (such as lead), prevents
Gamma signal cross-talk between scintillator.Optical fiber scintillator is coated with one layer of thin metallic reflection layers, such as 5 microns of aluminium films, backward to collect
The scintillation light of transmitting improves photon collection efficiency.
Detection for middle low energy neutron, neutron probe array portion select lithium glass as scintillator, wherein lithium core prisoner
It obtains middle low energy neutron and then decays and emit charged particle, charged particle excites scintillation light.
If necessary to improve spatial position resolution ratio either biggish sample, then it can increase linear transducer array unit number,
And use multiple photo multiplier device parallel processings.
As shown in Fig. 3 (c), impulse type accelerator neutron generator emits pulsed neutron beam, and neutron is collimated by collimator
After be irradiated to sample, by the neutron of sample transmission by neutron probe array detection, produced after neutron probe array detection to neutron
Raw blinking light, blinking light reach photoelectric converter (such as photomultiplier) by light guide transmission and are changed into electric pulse letter
Number, electric impulse signal is handled via electronics read-out device, while doing counting and flight time measurement, then will be treated
Electric signal is converted to the digital signal of certain logical relation and is sent in the computer processing system being for data processing, there
Image analysis software is converted into the figure that can intuitively analyze and related data again continuously has neutron to get to a series of
The neutron transmission image of energy information.
As shown in figure 5, rotating by combining CT technology to sample stage, a series of continuous of each lattice point is obtained
Neutron transmission image with neutron energy information, repeat the above steps to obtain different angle has in neutron energy information
The location information that different angle acquires is concentrated to three-dimensional space and energy is combined to believe by sub- transmission image, computer processing system
Breath, obtains atomic nucleus feature μ (x, y, z, E)=μ of the specimen material of each lattice point by comprehensive analysisxyz(E), this information is just
It is the atomic nucleus feature of specimen material, the nucleic that can uniquely determine material is compared with atomic nucleus database using it
Ingredient.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of white light neutron imaging method, comprising the following steps:
Step 11, impulse type accelerator neutron generator emit the pulsed neutron beam of wide power spectrum and record launch time；
Step 12, detector detect and measure the pulsed neutron beam, obtain position and the arrival time of each neutron, and by institute
The position and arrival time for stating each neutron are transferred to processing unit；
Step 13, the processing unit obtain the neutron according to the arrival time of each neutron and the launch time of record
Energy information is grouped all neutrons by energy, and obtains the neutron at different location according to the location information of the neutron and lead to
Amount
Step 14 places sample between impulse type accelerator neutron generator and detector, repeats step 11-13, obtains placing sample
Neutron flux when product at different locationAccording to describedValue and energy grouping information when placing sample it is raw
At a series of continuous neutron transmission images differentiated with neutron energy, energy resolution is able to carry out formant resolution.
2. white light neutron imaging method as described in claim 1, which is characterized in that the impulse type accelerator neutron generator is base
In large-scale spallation neutron target or based on the small-sized high current linear accelerator neutron source for accelerating deuterium beam.
3. white light neutron imaging method as claimed in claim 2, which is characterized in that the impulse type accelerator neutron generator provides
Neutron energy range magnitude from eV to 100,000,000 eV.
4. white light neutron imaging method as claimed in claim 3, which is characterized in that the detector is array type detector,
It is made of neutron probe array, photoelectric converter and electronics read-out device.
5. white light neutron imaging method as claimed in claim 4, which is characterized in that the neutron probe array is by more neutrons
Probe regular array is formed, and the measurement range of the neutron probe array and the energy range of the pulsed neutron source match.
6. white light neutron imaging method as claimed in claim 5, which is characterized in that the neutron probe is by scintillator and conduction
Optical fiber composition, the scintillator receive neutron and generate scintillation light, and the scintillation light turns through conduction fiber optic conduction to the photoelectricity
Parallel operation.
7. white light neutron imaging method as claimed in claim 6, which is characterized in that the scintillator is fast scintillator, is
Capillary type liquid scintillator, plastic scintillant, boracic scintillator or lithium glass.
8. white light neutron imaging method as claimed in claim 4, which is characterized in that the neutron probe array is in single pulse
The interior neutron received in detection energy range.
9. white light neutron imaging method as claimed in claim 8, which is characterized in that the electronics read-out device is for measuring
The arrival time of all neutrons of neutron probe array detection and location information in each pulse, and by the measurement it is all in
The arrival time and location information of son are transmitted to the processing unit.
10. a kind of lossless detection method of material composition, using white light neutron imaging as claimed in any one of claims 1-9 wherein
Method, the material sample are located on rotatable platform, comprising the following steps:
Step 21, rotation are located at the sample on rotatable platform, obtain different angle using the white light neutron imaging method and place
Neutron flux when sample at different location, a series of continuous neutrons with neutron energy information for obtaining different angle are saturating
Penetrate image；
Step 22, processing unit are according to a series of continuously with the neutron transmission figures of neutron energy information of the different angle
Picture obtains the transmission information of space cell lattice point using cross sectional reconstruction algorithm；
Step 23, processing unit by the total cross-section data of the transmission information of the space cell lattice point and nuclear data depositary Radionuclide into
Row comparison, obtains the composition of the material.
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| CN109343104B (en) * | 2018-09-11 | 2021-01-12 | 东莞中子科学中心 | Angle rotating mechanism for white light neutron source charged particle detection spectrometer |
| CN109152193A (en) * | 2018-09-19 | 2019-01-04 | 西安交通大学 | A kind of vehicle-mounted proton linac neutron source photographic system |
| WO2020107146A1 (en) * | 2018-11-26 | 2020-06-04 | 新瑞阳光粒子医疗装备(无锡)有限公司 | Particle accelerator, method and apparatus for determining energy of particles led out therefrom, and medium |
| CN110058293A (en) * | 2019-05-15 | 2019-07-26 | 中国科学院高能物理研究所 | A kind of openable and closable multi-panel reticulated shell device |
| CN112485277A (en) * | 2019-08-23 | 2021-03-12 | 天津理工大学 | Microscopic method for imaging atomic nucleus |
| CN113341453B (en) * | 2021-07-06 | 2022-12-13 | 散裂中子源科学中心 | White-light neutron imaging method and system for nuclide identification |
| CN115541635B (en) * | 2022-11-25 | 2023-03-10 | 中国工程物理研究院材料研究所 | D-T neutron imaging method and system |
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| CN101128731A (en) * | 2004-10-05 | 2008-02-20 | 澳联邦科学与工业研究组织 | Radiographic equipment |
| CN102221516A (en) * | 2011-03-17 | 2011-10-19 | 中国科学院化学研究所 | Adjusting device for monochromator of neutron reflecting spectrometer and method for adjusting monochromator by using same |
| CN102735701A (en) * | 2012-07-05 | 2012-10-17 | 重庆大学 | Multi-parameter integrated detection system for nuclear component |
| CN103971779A (en) * | 2014-05-21 | 2014-08-06 | 电子科技大学 | Small neutron source and preparing method thereof |
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