CN104936367B - Fluorescence generating means - Google Patents
Fluorescence generating means Download PDFInfo
- Publication number
- CN104936367B CN104936367B CN201510388693.0A CN201510388693A CN104936367B CN 104936367 B CN104936367 B CN 104936367B CN 201510388693 A CN201510388693 A CN 201510388693A CN 104936367 B CN104936367 B CN 104936367B
- Authority
- CN
- China
- Prior art keywords
- primary
- housing
- ray
- generating means
- fluorescence generating
- 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.)
- Expired - Fee Related
Links
Abstract
The present embodiments relate to a kind of fluorescence generating means, including：Housing, it is truncated rectangular pyramids structure, section is right-angled trapezium；The beam centre direction vertical shell bottom surface for the beam that primary radiation source projects；Housing bottom surface has primary filter mounting hole, has perforation hole on the side of vertical bottom face and top surface；Primary filter, it is arranged in primary filter mounting hole, the beam that primary radiation source projects enters the fluorescence generating means after being filtered by primary filter；Primary diaphragm, limit beam is carried out to the beam after primary filter filters；Radiant body, it is arranged at the chamfered inside of truncated rectangular pyramids structure housing；Beam by limiting beam, which is radiated on radiant body, inspires corresponding characteristic ray beam；Secondary filter, the top surface of vertical shell and bottom surface are arranged within housing；Secondary filter absorbs to the ray in the specific energy range in characteristic ray beam, obtains radiation quality fluorescent x ray, is projected by perforation hole.
Description
Technical field
The present invention relates to a kind of Optical devices, more particularly to a kind of fluorescence generating means.
Background technology
In recent decades, the development of nuclear radiation detector is very swift and violent, indicates the rapid progress of nuclear technology, and this has benefited from
The continuous breakthrough that electronic technology is developed by leaps and bounds with nuclear detection technology.Detector is the important equipment tested, its precision
Continuous improvement could promote the development of nuclear technology to greatest extent.Sound of the nuclear radiation detector in Low Energy Region (8-100) keV
Should be very big with energy variation, small energy difference may all make instrument and meter larger response change occur.Therefore, it is necessary to build
The accurately known lower energy photon reference radiation of vertical energy, the accurate measurement for instrument energy response provide Metrology Support.
Radio isotope can be suitably used for detector energy and efficiency calibration, because radioactive source is all being decayed all the time,
Use for a long time is needed to half-life period coefficient amendment；Due to its small volume, it preserves, transports, it is complex to manage, and has often
Close commercial Application radioactive source and lose the report to cause any property loss.Radiation beam caused by synchrotron radiation source is big, close rate is high, energy
Point is more, but establishes that Synchrotron Radiation is costly, and plant maintenance is also costly, and floor space is big, and use is highly inconvenient.
Using Prague principle, detector metering scale, its energy can also be applied to by going out Single photon by bicrystal diffraction dissociation
Point is more, purity is also very high, has certain application, but its radiation beam is small, close rate is low, there is certain limitation.
The content of the invention
The purpose of the present invention is the defects of being directed to prior art, there is provided a kind of fluorescence generating means, is set using trapezium structure
Meter, rational radiant body and secondary filter position distribution can maximumlly utilize material, cost-effective；Compact structure, make
The path minimum of photon, it ensure that the maximization of fluorescent yield；Meanwhile effectively reduce outside device context and in itself
Scattering radiation is to K caused by portionαThe influence of fluorescence purity.
To achieve the above object, the invention provides a kind of fluorescence generating means, the fluorescence generating means to include：
Housing, it is truncated rectangular pyramids structure, section is right-angled trapezium；Wherein, the bottom surface of the truncated rectangular pyramids structure housing is towards just
Level radiation source is set, and makes the beam centre direction of the beam that the primary radiation source the projects vertically bottom surface；The housing
Bottom surface there is primary filter mounting hole；There is perforation hole on the vertical bottom surface and the side of top surface；
Primary filter, it is arranged in the primary filter mounting hole, the beam that the primary radiation source projects passes through
Enter the fluorescence generating means after the primary filter filtering；
Primary diaphragm, it is right after being arranged at the primary filter along the beam direction of the primary radiation source beam
Beam after primary filter filters carries out limit beam, the area of the radiation beam is less than the area of radiant body；
The radiant body, it is arranged at the chamfered inside of the truncated rectangular pyramids structure housing；The radiant body is in the bottom surface
Upright projection and the position of the primary filter mounting hole coincide；Beam by limiting beam, which is radiated on radiant body, to be inspired
Corresponding characteristic ray beam；The beam centre direction of the characteristic ray beam and the beam centre direction phase of the primary radiation source
Vertically；
Secondary filter, the top surface of the vertical housing and bottom surface are arranged within the housing；The secondary filter
Ray in specific energy range in the characteristic ray beam is absorbed, the radiation quality fluorescent x ray is obtained, by institute
State perforation hole injection.
Preferably, the radiation quality fluorescent x ray that the perforation hole projects is connect by the receiver being arranged at outside the perforation hole
Receive, to analyze the composition of the radiation quality fluorescent x ray.
It is further preferred that the receiver is specially F1 numbered cards.
Preferably, monitoring unit is provided with the outer wall of the housing, detection is reached outside housing by the housing
Ray, so as to be detected to the screening ability of the housing.
It is further preferred that institute's monitoring unit is body lattice cell.
Preferably, the radiant body is GeO2Material is made, and the secondary filter is Ga2O3Material is made.
It is further preferred that the characteristic ray beam includes L, KαAnd KβRay, the ray bag in the specific energy range
Include KβWith L rays.
Preferably, the angle on the inclined-plane and the top surface and bottom surface is 45 °.
Fluorescence generating means provided in an embodiment of the present invention, designed using trapezium structure, rational radiant body and secondary mistake
Filter position distribution can maximumlly utilize material, cost-effective；Compact structure, make the path minimum of photon, ensure that
The maximization of fluorescent yield；Meanwhile effectively reduce scattering outside device context and caused by therein and radiate to KαIt is glimmering
The influence of optical purity.
Brief description of the drawings
Fig. 1 is the diagrammatic cross-section of fluorescence generating means provided in an embodiment of the present invention；
Fig. 2 is radiation quality Ge primary fluors fluence spectrogram provided in an embodiment of the present invention；
Fig. 3 is radiation quality Ge secondary fluors fluence spectrogram provided in an embodiment of the present invention.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
Monte Carlo neutron-photon transport program (Monte CarloN-Particle Transport Code, MCNP)
Be Los Alamos laboratory applications Theoretical Physics portion of the U.S. (X portions) Monte Carlo groups (X-6 groups) develop based on
Calculate the large-sized multifunction program of the PARTICLE TRANSPORT FROM in complex three-dimensional geometry.MCNP can be used for calculate neutron, photon and in
The transport issues of son-photon coupling, it can also calculate the eigenvalue problem of critical system (including subcritical and overcritical).
Fluorescence generating means provided in an embodiment of the present invention, it is the fluorescence generating means model established based on MCNP programs.
Fig. 1 is the light path transmission structure schematic diagram of fluorescence generating means provided in an embodiment of the present invention.As shown in figure 1, this
The fluorescence generating means of inventive embodiments includes：Housing 1, primary filter 2, primary diaphragm (not shown), the and of radiant body 3
Secondary filter 4.
Housing 1, it is truncated rectangular pyramids structure, section is right-angled trapezium.
Wherein, the bottom surface 11 of the truncated rectangular pyramids structure housing 1 is set towards primary radiation source 5, projects primary radiation source 5
Beam beam centre direction vertical bottom face 11.
The bottom surface 11 of housing 1 has primary filter mounting hole 101；Have on the side 13 of vertical bottom face 11 and top surface 12
Perforation hole 102.
Primary filter 2, it is arranged in the primary filter mounting hole 101.The beam that primary radiation source 5 projects passes through
Enter after primary filter filtering in fluorescence generating means.
Primary diaphragm, after being arranged at primary filter 2 along the beam direction of the beam of primary radiation source 5, to through primary
Beam after filter 2 filters carries out limit beam, the area of radiation beam is less than 3 areas of radiant body.
Radiant body 3, it is arranged at the inner side of inclined-plane 14 of truncated rectangular pyramids structure housing 1；Radiant body 3 bottom surface 11 upright projection with
The position of primary filter mounting hole 101 coincides.
Beam by limiting beam, which is radiated on radiant body 3, inspires corresponding characteristic ray beam.Inclined-plane 14 and top surface 12
45 °, therefore the beam centre direction of characteristic ray beam and the beam centre of primary radiation source 5 are both preferably with the angle of bottom surface 13
Direction is perpendicular.
Secondary filter 4, the top surface 12 of vertical shell 1 and bottom surface 11 are arranged within housing 1.
Secondary filter 4 absorbs to the ray in the specific energy range in characteristic ray beam, and it is glimmering to obtain radiation quality
Light ray, and projected by perforation hole 102.
Shown in Fig. 1, the beam direction of the beam of primary radiation source 5 for vertically downward, the bottom surface 11 of housing 1 and
Primary filter 2 is horizontally disposed, and primary diaphragm is arranged at the lower section of primary filter 2.Characteristic ray beam is penetrated
Beam center direction for it is horizontal to the right.The beam centre direction of radiation quality fluorescent x ray also for it is horizontal to the right.
In order to be detected to the screening ability of housing, monitoring unit can be set on the outer wall of housing 1, detection passes through
The housing reaches the ray outside housing.
In order to analyze the composition of radiation quality fluorescent x ray, receiver 6 can be set outside perforation hole 102, received
The radiation quality fluorescent x ray of injection.
The fluorescence generating means of the present invention is illustrated with a specific example below.
Primary radiation source selects the unfiltered bremsspectrums of German federal physical technique research institute (PTB) laboratory 60kV
As the incident spectrum of simulation.Multiple 2cm × 2cm × 2cm body lattice cell is set as monitoring in the outer wall of fluorescence generating means housing
Unit, its count value are all 0, illustrate that the shield effectiveness of device is good.Receiver uses F1 numbered cards.Simulated by F1 numbered cards
The number of photons that setting area is passed through, is measured to flux.Radiant body selects GeO2Material, secondary filter select Ga2O3Material
Material.
Do not have contributive low energy partial photonic to producing fluorescence in primary filter filtering primary radiation source ray.Primary mistake
Filter can be with raffinal film-making (purity>99.99%), according to exciting fluorescent energy different, thickness is respectively 0.5mm and 1mm,
For the effect of accurate validation primary filter, determine that primary radiation source passes through the spectrum of primary filter by MCNP simulation softwards.
Mainly there is K after the primary radiation source exciting radiation body of primary filterβ、Kα, L rays and X-ray production apparatus high-energy section
Photon, pass through Ga2O3The secondary filter of material can effectively eliminate radiation quality Ge KβPhoton, obtained radiation quality fluorescence
Ray is the higher K of purityαLine.
For the effect of the clearer fluorescence generating means for showing the present invention, using F1 numbered cards to radiation quality fluorescence
Ray and primary radiation source ray carry out contrast collection, and the counting mapping of F1 numbered cards is handled.At the beginning of Fig. 2 is radiation quality Ge
Level fluorescence fluence spectrum, Fig. 3 are radiation quality Ge secondary fluors fluence spectrum.
It can be shown from Fig. 2, unfiltered fluorescence Spectra has four to absorb limit, and two of which is copper fluorescent apparatus material
Caused fluorescence, corresponding energy are 8.0keV, 8.9keV, and two other is K caused by radiant body material Geα、KβEnergy is distinguished
It is 9.9keV, 11.0keV, finds to have the scattering of part in its both sides, this is by KαAnd KβGeneration Rayleigh scattering and Compton dissipate
Two platforms penetrated and formed, and the scattering composition of the scattered photon of high-energy section photon in the initial power spectrum of X-ray production apparatus.
This partial photonic proportion in total photon number is smaller, relative to KαAnd KβContribution can be ignored.
From figure 3, it can be seen that Ga2O3The secondary filter of material can effectively eliminate radiation quality Ge KβPhoton, together
When inhibit device Cu material fluorescence, substantially increase KαFluorescence purity.
Fluorescence generating means provided in an embodiment of the present invention, designed using trapezium structure, rational radiant body and secondary mistake
Filter position distribution can maximumlly utilize material, cost-effective；Compact structure, make the path minimum of photon, ensure that
The maximization of fluorescent yield；Meanwhile effectively reduce scattering outside device context and caused by therein and radiate to KαIt is glimmering
The influence of optical purity.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (5)
1. a kind of fluorescence generating means, it is characterised in that the fluorescence generating means includes：
Housing, it is truncated rectangular pyramids structure, section is right-angled trapezium；Wherein, the bottom surface of the truncated rectangular pyramids structure housing is towards primary spoke
Source setting is penetrated, makes the beam centre direction of the beam that the primary radiation source the projects vertically bottom surface；The bottom of the housing
Face has primary filter mounting hole；There is perforation hole on the vertical bottom surface and the side of top surface；On the outer wall of the housing
Monitoring unit is provided with, detection reaches the ray outside housing by the housing, so as to enter to the screening ability of the housing
Row detection；The monitoring unit is body lattice cell；
Primary filter, it is arranged in the primary filter mounting hole, the beam that the primary radiation source projects passes through described
Enter the fluorescence generating means after primary filter filtering；
Primary diaphragm, after being arranged at the primary filter along the beam direction of the primary radiation source beam, to passing through just
Beam after level filter filtering carries out limit beam, the area of the radiation beam is less than the area of radiant body；
The radiant body, it is arranged at the chamfered inside of the truncated rectangular pyramids structure housing；The radiant body is vertical the bottom surface
Project and coincided with the position of the primary filter mounting hole；Beam by limiting beam, which is radiated on radiant body, to be inspired accordingly
Characteristic ray beam；Mutually hung down with the beam centre direction of the primary radiation source in the beam centre direction of the characteristic ray beam
Directly；
Secondary filter, the top surface of the vertical housing and bottom surface are arranged within the housing；The secondary filter is to institute
The ray stated in the specific energy range in characteristic ray beam is absorbed, and obtains radiation quality fluorescent x ray, and by the outgoing
Project in hole；
The radiation quality fluorescent x ray that the perforation hole projects is received by the receiver being arranged at outside the perforation hole, to described
The composition of radiation quality fluorescent x ray is analyzed.
2. fluorescence generating means according to claim 1, it is characterised in that the receiver is specially F1 numbered cards.
3. fluorescence generating means according to claim 1, it is characterised in that the radiant body is GeO2Material is made, described
Secondary filter is Ga2O3Material is made.
4. fluorescence generating means according to claim 3, it is characterised in that the characteristic ray beam includes L, KαAnd KβPenetrate
Line, the ray in the specific energy range include KβWith L rays.
5. fluorescence generating means according to claim 1, it is characterised in that the inclined-plane and the top surface and the folder of bottom surface
Angle is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388693.0A CN104936367B (en) | 2015-07-03 | 2015-07-03 | Fluorescence generating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388693.0A CN104936367B (en) | 2015-07-03 | 2015-07-03 | Fluorescence generating means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104936367A CN104936367A (en) | 2015-09-23 |
| CN104936367B true CN104936367B (en) | 2017-12-19 |
Family
ID=54123245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510388693.0A Expired - Fee Related CN104936367B (en) | 2015-07-03 | 2015-07-03 | Fluorescence generating means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104936367B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731966A (en) * | 2014-01-03 | 2014-04-16 | 中国原子能科学研究院 | Integrated fluorescence generating device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242521Y (en) * | 1995-11-16 | 1996-12-11 | 谭大刚 | Medical X-ray tube of fluorescent-enhancement type |
-
2015
- 2015-07-03 CN CN201510388693.0A patent/CN104936367B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731966A (en) * | 2014-01-03 | 2014-04-16 | 中国原子能科学研究院 | Integrated fluorescence generating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104936367A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kwan et al. | Discrete deexcitations in U 235 below 3 MeV from nuclear resonance fluorescence | |
| Russkikh et al. | Experimental and theoretical study of organometallic radiation-protective materials adapted to radiation sources with a complex isotopic composition | |
| CA2808721A1 (en) | Portable system for analyzing and determining elemental composition of rock samples | |
| US10386499B2 (en) | Device for determining a deposited dose and associated method | |
| CN104990946A (en) | K-fluorescent X-ray radiation appliance | |
| Kim et al. | Reference thermal neutron field at KRISS for calibration of neutron detectors | |
| Shukla et al. | Development of neutron imaging beamline for NDT applications at Dhruva reactor, India | |
| CN104936367B (en) | Fluorescence generating means | |
| Silari et al. | The CERN-EU high-energy Reference Field (CERF) facility: applications and latest developments | |
| CN204795819U (en) | Fluorescence generating device | |
| CN204789416U (en) | K fluorescent x -rays radiation appliance | |
| Li et al. | Monte Carlo simulation investigation on the minitype reference radiation employed for the calibration of gamma ray dose or dose rate meters | |
| Joseph et al. | Geometry Correction in Efficiency of a Sodium Iodide (Thallium Activated), NaI (Tl) Detector | |
| Qian et al. | Monte Carlo simulation investigation on the minimum dimension of gamma reference radiation regulated by ISO 4037–1 | |
| Kudo et al. | Measurement of/spl gamma/-ray dose in a thermal neutron field by using a/sup 3/He-filtered GM counter | |
| Harano et al. | Development of a compact flat response neutron detector | |
| RU214394U1 (en) | NEUTRON DETECTION DEVICE | |
| Mitchell et al. | Neutron counting and gamma spectroscopy with PVT detectors. | |
| Krivopustov et al. | About the first experiment on investigation of 129 I, 237 Np, 238 Pu and 239 Pu transmutation at the nuclotron 2.52 GeV deuteron beam in neutron field generated in U/Pb-assembly'Energy plus transmutation' | |
| Murataka et al. | Dose Rate Estimation Around a 60 Co γ-ray Irradiation Source by Means of 115m In Photoactivation | |
| Gutermuth et al. | Test of the rem-counter WENDI-II from Eberline in different energy-dispersed neutron fields | |
| Beasley et al. | Characterisation of the epithermal neutron irradiation facility at the Portuguese research reactor using MCNP | |
| Wójcik-Gargula et al. | Characterization of the Coaxial n-type HPGe Detector for Activity Measurements of ITER Materials Irradiated in JET | |
| Gambarini et al. | Gel dosimeters for dose imaging in high fluences of epithermal neutrons: Potentiality and limitations | |
| Franco | Characterization of the neutron irradiation system for use in the Low-Dose-Rate Irradiation Facility at Sandia National Laboratories. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20180703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |