CN206421035U - A kind of point-like radiation source device - Google Patents
A kind of point-like radiation source device Download PDFInfo
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- CN206421035U CN206421035U CN201720014191.6U CN201720014191U CN206421035U CN 206421035 U CN206421035 U CN 206421035U CN 201720014191 U CN201720014191 U CN 201720014191U CN 206421035 U CN206421035 U CN 206421035U
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Abstract
The utility model provides a kind of point-like radiation source device, and the irradiator includes radiation source assemblies, carrying shield, Yuan Cang, beam channel, lifting source component, dosage homogenizer, dosage adjuster, detection and positioning component.Point-like radiation source device of the present utility model is coordinated dosage homogenizer using dosage adjuster, is realized dosage using open pencil of forms circulation road increase line launched field（Rate）The function that field homogenizing, adjustment and scattering background suppress.Point-like radiation source device of the present utility model can optimize point-like radioactive source radiation field dosage（Rate）Distribution, adjustment dosage（Rate）Value, suppression scattering background, obtaining has wide close rate scope, big specification irradiation face, the radiation field of low scattering composition；Can away from the nearer region in source there is provided specification reach m magnitudes Uniform Irradiation face；Space Low energy scattering γ is low, is suitable for total dose irradiation examination experiment；Wide close rate range of radiation can be obtained in the range of limited place, close rate can cover several magnitudes.
Description
Technical field
The utility model belongs to ionization radiation effect experimental technique field, and in particular to a kind of point-like radiation source device.
Background technology
Point-like gamma ray radiator irradiation devices are one of irradiation effects usual means, are mainly used in low, median dose rate
In the range of the research field such as the examination of microelectronic material/device radiation hardening, Study on Radiation Modification of Polymeric Materials and medical treatment sterilizing.Point
Source etc.（Absorb）Close rate face is the series of concentric disc centered on radioactive source.Consider that sample is generally planar shaped（Such as integrated electricity
Road plate etc.）, actual use irradiation face is the section on concentric ball, GJB 5422-2005 and GJB 548B-2005 requirements
Irradiate close rate unevenness U≤10% of plane so that limited by steric requirements in irradiation face specification.It is presently used for ionizing spoke
Penetrating the point source illumination device of effect experiment research mainly has two kinds：Self-shielding type and collimation formula.For batch, large scale sample irradiation
For experiment, the advantage of existing irradiation devices and it is disadvantageous in that：Self-shielding type irradiator, is used for smallclothes sample irradiation,
Such as Blood disinfection, advantage is can be used in small place, but is only capable of providing the irradiation face of several centimetres ~ more than ten centimetres of specification, and E
γ≤300keV low energy gamma scattering compositions are larger, influence sample irradiation dose assessment；Collimation formula irradiator, is used for instrument school
Standard, is at utmost to suppress scattering γ, lifts quality of beam using beam channel and collimater, such irradiator can be produced
The preferable gamma radiation field of energy unicity, scatters composition≤5%, and Chinese courtyard can research institute and Chinese measuring science technical research
The units such as institute represent the highest technical merit of such domestic irradiator, but the irradiation plane that can provide of such device generally compared with
Small, specification is about 10cm ~ 25cm.Meanwhile, with the increase of nuclear facility dynamics and people's material resources cost, owner's unit is to can
Realize that the potential demand of wide close rate range illumination device constantly increases.
Chinese patent literature storehouse is disclosed " a kind of gamma-ray irradiation device for measurement verification "（Publication number：CN
204203471 U）, " a kind of portable beam exposure apparatus "（Publication number：CN 104345335 A）, " gamma ray intense source shine
Emitter "（Publication number：CN 104345335 A）, " Portable multi-range reference radiation device "（Publication number：
CN201110392048）, " γ Multi-source gamma calibration devices "（Publication number：CN 201955473 U）Deng point γ sources irradiator.This is several
Point γ sources irradiator is planted, because application direction demand is different, or suppression scattering background, or the light ` of instrument, or close rate is absorbed in
It is limited in scope, is not all suitable for batch or large scale sample, wide close rate scope irradiation experiment.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of point-like radiation source device.
Point-like radiation source device of the present utility model, is characterized in：Described irradiator includes radiation source assemblies, source
Tank, Yuan Cang, beam channel, lifting source component, dosage homogenizer, dosage adjuster, detection and positioning component；
Described carrying shield includes shielding slab and ladle bowl；Described shielding slab is shielding material, and ladle bowl is wrapped in shielding slab
Outer surface, is provided with the middle font inner chamber of bottom lock, middle font inner chamber is by up to from top to bottom on the vertical axis of shielding slab
Under be followed successively by upper cavity, center cavity and lower cavity, center cavity is source storehouse, centered on the central point of center cavity, edge
Horizontal axis is provided with the conical beam channel that semi-cone angle is φ on carrying shield, and the exit of beam channel is equal covered with dosage
Change device, dosage adjuster is distributed along horizontal median axis in the outside of dosage homogenizer；Described radiation source assemblies include putting vertically
The source bar put, top and the lifting source component of source bar are connected, and shield plug is arranged at the top of source bar, and the bottom of source bar is enclosed with radiation
Source, lifting source component drives source bar to be moved up and down in middle font inner chamber, and source bar moves up to radioactive source in middle font
The central point of chamber, source bar moves downwardly to the lower cavity that radioactive source is located at middle font inner chamber, and shield plug is compressed in shielding slab
Font lumen openings；
Detection includes dose measurement instrument and laser locator with positioning component, and described dose measurement instrument is placed on carrying shield
Outside, measures the close rate of radioactive source, and described laser locator is placed on the outside of carrying shield, measurement radioactive source and testing sample
Between horizontal range.
Described source storehouse includes source storehouse chamber and source bulkhead, and source storehouse chamber is cavity, and source bulkhead is sandwich construction, including inwall
Layer, intermediate wall layers and outer wall layer, the material of inner wall layer is low Z metal materials, and the material of intermediate wall layers is middle Z metal materials, outside
The material of parietal layer is high-strength metal material.
Described beam channel includes beam channel chamber and beam channel wall, and described beam channel chamber is semi-cone angle φ's
The cavity of cone, semi-cone angle φ scope is 10 ° ~ 45 °；Described beam channel wall be sandwich construction, including inner wall layer, in
Between parietal layer and outer wall layer, the material of inner wall layer is low Z metal materials, and the material of intermediate wall layers is middle Z metal materials, outer wall layer
Material be high-strength metal material.
Described lifting source component includes lifting source channels, lifting channel wall, motor, connecting rod and travel switch；It is described
Lifting source channels be shielding slab in middle font inner chamber；Described lifting channel wall is lifts the wall of source channels, and material is
Stainless steel；Described connecting rod is connected with shield plug, and travel switch controlled motor drives connecting rod vertically movable.
Described dosage homogenizer includes homogenizing piece and homogenizing piece frame, described homogenizing piece frame parcel dosage homogenizing piece
Edge, the exit for the beam channel that dosage homogenizer is covered and is fixed on ladle bowl；
Described homogenizing piece quantity is 1, and homogenizing piece is special-shaped axial symmetry entity structure, and side is plane I, and opposite side is
Three-dimensional arc I, using z-axis as symmetry axis, the expression formula of three-dimensional arc I for being homogenized piece is as follows：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point I on three-dimensional arc I；d u For plane I and the level of radioactive source
Distance；M u For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；μTo be homogenized line attenuation coefficient of the material to γ of piece；θFor
Cambered surface point I, the line of radioactive source withzThe angle of axle,θ∈[-φ, φ]。
Described dosage adjuster includes attenuator, support and attenuator frame, and described attenuator is placed on by branch
In attenuator frame；The quantity of attenuator is 1 or multi-disc, and attenuator is spaced apart；Attenuator is got over radioactive source horizontal range
Closely, attenuation multiple is bigger.
Described attenuator is different in nature entity structure, and side is plane II, and opposite side is three-dimensional arc II, using z-axis as pair
Claim axle, the expression formula of three-dimensional arc II of attenuator is as follows：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point II on three-dimensional arc II；d a For plane II and radioactive source
Distance；M a For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；θFor cambered surface point II, the line of radioactive source withzThe angle of axle,θ∈[-φ, φ]；t a For the material maximum gauge of the corresponding attenuator of attenuation multiple of attenuator.
Horizontal interval scope between described homogenizing piece and attenuator is 0.5cm ~ 5cm, homogenizing piece and attenuator material
Expect for one kind in lead, tungsten alloy or depleted uranium material, if the material of homogenizing piece and attenuator is lead, one layer is wrapped up on the surface of lead
Thickness range is one kind in 0.5mm ~ 2mm aluminium or titanium.
Described radioactive source is that single energy or quasi- list of the energy in the range of 600keV ~ 2MeV can point-like gamma ray radiators.
Point-like radiation source device of the present utility model introduces two kinds of new constructions of dosage homogenizer and dosage adjuster, and
The structures such as matching beam channel and shielding slab have been redesigned, a kind of novel point for possessing dosage expansion function is established
Source irradiator.
Point-like radiation source device of the present utility model can optimize a radiation field dosage（Rate）Distribution, adjustment dosage（Rate）
Value, suppression scattering background, obtaining has wide close rate scope, big specification irradiation face, the radiation field of low scattering composition；Can away from
About 10 times are improved there is provided the Uniform Irradiation face that specification reaches m magnitudes, more common irradiator in the nearer region in source；Space Low energy scattering
γ is low, is suitable for total dose irradiation examination experiment；Wide close rate range of radiation, agent can be obtained in the range of limited place
Dose rate can cover several magnitudes.
Brief description of the drawings
Fig. 1 is the principle schematic of point-like radiation source device of the present utility model；
Fig. 2 is the structural representation of point-like radiation source device of the present utility model；
Fig. 3 is the homogenizing chip architecture schematic diagram in point-like radiation source device of the present utility model；
Fig. 4 is the attenuator structural representation in point-like radiation source device of the present utility model.
In figure, the beam channel wall of 1. radioactive source, 2. shielding slab, 3. beam channel chamber 4., 5. homogenizing pieces, 6. homogenizing piece sides
Frame, 7. attenuators, 8. supports, 9. attenuator frames, 10. source storehouse chambers, 11. lifting source channels, 12. lifting channel walls, 13. tanks
Shell, 14. laser locators, 15. dose measurement instrument, 16. connecting rods, 17. motors, 18. travel switches, 19. source bars, 20. source storehouses
Wall, 21. shield plugs, 31. irradiation faces, 41. irradiation faces.
Embodiment
Describe the utility model in detail with reference to the accompanying drawings and examples.
Following examples are merely to illustrate the utility model, and are not limitation of the utility model.Relevant technical field
Personnel in the case where not departing from spirit and scope of the present utility model, can also make a variety of changes, replace and modification, because
This equal technical scheme falls within category of the present utility model.
As Figure 1-4, point-like radiation source device of the present utility model includes radiation source assemblies, carrying shield, Yuan Cang, line
Passage, lifting source component, dosage homogenizer, dosage adjuster, detection and positioning component；
Described carrying shield includes shielding slab 2 and ladle bowl 13；Described shielding slab 2 is shielding material, and ladle bowl 13 is wrapped in screen
The outer surface of block 2 is covered, is provided with from top to bottom on the vertical axis of shielding slab 2 in the middle font inner chamber of bottom lock, middle font
Chamber is from top to bottom followed successively by upper cavity, center cavity and lower cavity, and center cavity is source storehouse, using the central point of center cavity as
Center, the conical beam channel that semi-cone angle is φ, the exit covering of beam channel are provided with along horizontal axis on carrying shield
There is dosage homogenizer, dosage adjuster is distributed along horizontal median axis in the outside of dosage homogenizer；Described radiation source assemblies bag
The source bar 19 placed vertically is included, top and the lifting source component of source bar 19 are connected, and shield plug 21, source bar 19 are arranged at the top of source bar 19
Bottom be enclosed with radioactive source 1, lifting source component drives source bar 19 to be moved up and down in middle font inner chamber, the motion upwards of source bar 19
It is located at the central point of middle font inner chamber to radioactive source 1, it is empty positioned at the bottom of middle font inner chamber that source bar 19 moves downwardly to radioactive source 1
Chamber, shield plug 21 compresses the middle font lumen openings of shielding slab 2；
Detection includes dose measurement instrument 15 and laser locator 14 with positioning component, and described dose measurement instrument 15 is placed on
The outside of carrying shield, measures the close rate of radioactive source 1, and described laser locator 14 is placed on the outside of carrying shield, measures radioactive source 1
Horizontal range between testing sample.
Described source storehouse includes source storehouse chamber 10 and source bulkhead 20, and source storehouse chamber 10 is cavity, and source bulkhead 20 is sandwich construction, bag
Inner wall layer, intermediate wall layers and outer wall layer are included, the material of inner wall layer is low Z metal materials, and the material of intermediate wall layers is middle Z metals
Material, the material of outer wall layer is high-strength metal material.
Described beam channel includes beam channel chamber 3 and beam channel wall 4, and described beam channel chamber 3 is semi-cone angle
φ conical cavity, semi-cone angle φ scope is 10 ° ~ 45 °；Described beam channel wall 4 is sandwich construction, including inwall
Layer, intermediate wall layers and outer wall layer, the material of inner wall layer is low Z metal materials, and the material of intermediate wall layers is middle Z metal materials, outside
The material of parietal layer is high-strength metal material.
Described lifting source component includes lifting source channels 11, lifting channel wall 12, motor 17, connecting rod 16 and stroke and opened
Close 18；Described lifting source channels 11 are the middle font inner chamber in shielding slab 2；Described lifting channel wall 12 is lifting source channels
11 wall, material is stainless steel；Described connecting rod 16 is connected with shield plug 21, and the controlled motor 17 of travel switch 18, which drives, to be connected
Extension bar 16 is vertically movable.
Described dosage homogenizer includes homogenizing piece 5 and homogenizing piece frame 6, and the described parcel dosage of homogenizing piece frame 6 is equal
Change the edge of piece 5, the exit for the beam channel that dosage homogenizer is covered and is fixed on ladle bowl 13；
The described quantity of homogenizing piece 5 is 1, and homogenizing piece 5 is special-shaped axial symmetry entity structure, and side is plane I, opposite side
For three-dimensional arc I, using z-axis as symmetry axis, the expression formula of three-dimensional arc I for being homogenized piece 5 is as follows：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point I on three-dimensional arc I；d u For plane I and the water of radioactive source 1
Flat distance；M u For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；μTo be homogenized line attenuation coefficient of the material to γ of piece 5；θ
For cambered surface point I, the line of radioactive source 1 withzThe angle of axle,θ∈[-φ, φ]。
Described dosage adjuster includes attenuator 7, support 8 and attenuator frame 9, and described attenuator 7 passes through support 8
It is placed in attenuator frame 9；The quantity of attenuator 7 is 1 or multi-disc, and attenuator 7 is spaced apart；Attenuator 7 and the water of radioactive source 1
Flat distance is nearer, and attenuation multiple is bigger.
Described attenuator 7 is different in nature entity structure, and side is plane II, and opposite side is three-dimensional arc II, using z-axis as pair
Claim axle, the expression formula of three-dimensional arc II of attenuator 7 is as follows：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point II on three-dimensional arc II；d a For plane II and radioactive source 1
Distance；M a For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；θFor cambered surface point II, the line of radioactive source 1 withzThe folder of axle
Angle,θ∈[-φ, φ]；t a For the material maximum gauge of the corresponding attenuator 7 of attenuation multiple of attenuator 7.
Described homogenizing piece 5 and attenuator 7 is spaced apart, and the material of homogenizing piece 5 and attenuator 7 is lead, tungsten alloy or poor
One kind in uranium material, if the material of homogenizing piece 5 and attenuator 7 is lead, a layer thickness scope is wrapped up on the surface of lead for 0.5mm
One kind in ~ 2mm aluminium or titanium.
Described radioactive source 1 is that single energy or quasi- list of the energy in the range of 600keV ~ 2MeV can point-like gamma ray radiators.
Embodiment 1
φ=37 ° in beam channel chamber 3 in embodiment in the present embodiment, beam channel wall 20 is three-decker, by it is interior to
Outside, aluminium thick respectively 1mm, copper, stainless steel；Shielding slab 2 is lead material, and ladle bowl 13 is 0.5cm stainless steels, and radioactive source 1 is Co-60
Quasi- monoenergetic emission source, gamma energy 1.17MeV and 1.32MeV（Average 1.25MeV）, activity 10Ci；The specification of source storehouse chamber 14 is 3cm
(x) × 3cm (y) × 3cm (z), source bulkhead 20 is the thick aluminium of 2mm；Radiation chamber specification 3m (x) × 3m (y) × 6m (z).
Homogenizing piece 5 is depleted uranium material, density 19.04g/cm3, with radioactive source 1 apart from 28cm, with reference to irradiation face 32 and radiation
Source 1 is apart from 50cm, the dosage homogenizing top cambered surface coordinate such as following formula of piece 31.
Refering to Fig. 4, attenuator 7 sets 1 in embodiment, lead material, and density 11.34g/cm3, its shell is the thick aluminium of 1mm,
Attenuator 7 with radioactive source 1 apart from 29.5cm, the attenuation multiple set is as 0.5, corresponding shielding material thickness 1.2cm, refer to
Irradiation face 42 is with radioactive source 1 apart from 50cm, the top cambered surface coordinate such as following formula of attenuator 7.
After above-mentioned implementation, the utility model Uniform Irradiation face diameter reach 70cm@z=50cm, 140cm@z=100cm,
For 160cm@z=110cm, more conventional irradiator（φ is about 3 °）, increase about 13 times, the attenuator actual attenuation factor is about
0.45。
After above-mentioned implementation, the following Low energy scattering γ ratios of the utility model 300keV are considerably less than external Related product
（The type irradiation devices of Gamma cell 220）, illustrate that the utility model can be used for associated sample Study on Irradiation Effects, this practicality is new
Type Low energy scattering γ is to dosage（Rate）Contribute≤1%@z ∈ [50cm, 110cm].
Embodiment 2
The present embodiment and the embodiment of embodiment 1 are essentially identical, and the main distinction is, φ=10 ° in beam channel chamber 3,
Attenuator 7 sets 2, tungsten material, density 19.31g/cm3, the attenuation multiple of setting is respectively 0.5 and 0.2, corresponding shielding material
Material thickness is respectively 0.75cm, 1.4cm, and attenuator interval 1cm is placed.
After above-mentioned implementation, the utility model Uniform Irradiation face diameter reach 12cm@z=50cm, 25cm@z=100cm,
For 30cm@z=110cm, more conventional irradiator, increase about 2.3 times, the attenuator actual attenuation factor is about 0.46.
Embodiment 3
The present embodiment and the embodiment of embodiment 1 are essentially identical, and the main distinction is, radioactive source 1 is the mono- energy of Cs-137
Radioactive source, gamma energy 0.662keV, activity 10Ci, the setting of attenuator 71, tungsten material, the attenuation multiple of setting is respectively 0.5, right
The shielding material thickness answered is 0.50cm.
After above-mentioned implementation, the utility model Uniform Irradiation face diameter reach 40cm@z=50cm, 80cm@z=100cm,
For 89cm@z=110cm, more conventional irradiator, increase about 13 times, the attenuator actual attenuation factor is about 0.06.
Embodiment 4
The present embodiment and the embodiment of embodiment 3 are essentially identical, and the main distinction is, φ=30 ° in beam channel chamber 3,
Attenuator 7 sets 3, depleted uranium material, density 19.35g/cm3, the attenuation multiple of setting is respectively 0.5,0.5,0.2, corresponding screen
It is respectively 0.65cm, 0.65cm, 1.4cm to cover material thickness, and attenuator interval 1cm is placed.
After above-mentioned implementation, the utility model Uniform Irradiation face diameter reach 40cm@z=50cm, 80cm@z=100cm,
For 89cm@z=110cm, more conventional irradiator, increase about 7.6 times, the attenuator actual attenuation factor is about 0.06.
Claims (8)
1. a kind of point-like radiation source device, it is characterised in that：Described irradiator includes radiation source assemblies, carrying shield, Yuan Cang, beam
Circulation road, lifting source component, dosage homogenizer, dosage adjuster, detection and positioning component；
Described carrying shield includes shielding slab（2）And ladle bowl（13）；Described shielding slab（2）For shielding material, ladle bowl（13）Parcel
In shielding slab（2）Outer surface, in shielding slab（2）Vertical axis on be provided with the middle font inner chamber of bottom lock from top to bottom,
Middle font inner chamber is from top to bottom followed successively by upper cavity, center cavity and lower cavity, and center cavity is source storehouse, with center cavity
Centered on central point, it is provided with carrying shield the conical beam channel that semi-cone angle is φ along horizontal axis, beam channel goes out
Covered with dosage homogenizer at mouthful, dosage adjuster is distributed along horizontal median axis in the outside of dosage homogenizer；Described radiation
Source component includes the source bar placed vertically（19）And shield plug（21）, source bar（19）Top with lifting source component be connected, source bar
（19）Top have shield plug（21）, source bar（19）Bottom be enclosed with radioactive source（1）, lifting source component drive source bar（19）
Moved up and down in middle font inner chamber, source bar（19）Move up to radioactive source（1）Central point positioned at middle font inner chamber, source bar
（19）Move downwardly to radioactive source（1）Lower cavity positioned at middle font inner chamber, shield plug（21）Compress shielding slab（2）Middle word
Shape lumen openings；
Detection includes dose measurement instrument with positioning component（15）And laser locator（14）, described dose measurement instrument（15）Place
In the outside of carrying shield, for measuring radioactive source（1）Close rate；Described laser locator（14）The outside of carrying shield is placed on,
For measuring radioactive source（1）Horizontal range between testing sample.
2. point-like radiation source device according to claim 1, it is characterised in that：Described source storehouse includes source storehouse chamber（10）
With source bulkhead（20）, source storehouse chamber（10）For cavity, source bulkhead（20）For sandwich construction, including inner wall layer, intermediate wall layers and outer wall
Layer, the material of inner wall layer is low Z metal materials, and the material of intermediate wall layers is middle Z metal materials, and the material of outer wall layer is high intensity
Metal material.
3. point-like radiation source device according to claim 1, it is characterised in that：Described beam channel is logical including line
Road chamber（3）With beam channel wall（4）, described beam channel chamber（3）For semi-cone angle φ conical cavity, semi-cone angle φ's
Scope is 10 ° ~ 45 °；Described beam channel wall（4）For sandwich construction, including inner wall layer, intermediate wall layers and outer wall layer, inwall
The material of layer is low Z metal materials, and the material of intermediate wall layers is middle Z metal materials, and the material of outer wall layer is high duty metal material
Material.
4. point-like radiation source device according to claim 1, it is characterised in that：Described lifting source component includes lifting
Source channels（11）, lifting channel wall（12）, motor（17）, connecting rod（16）And travel switch（18）；Described lifting source channels
（11）For shielding slab（2）Interior middle font inner chamber；Described lifting channel wall（12）For lifting source channels（11）Wall, material
For stainless steel；Described connecting rod（16）With shield plug（21）It is connected, travel switch（18）Controlled motor（17）Drive connecting rod
（16）It is vertically movable.
5. point-like radiation source device according to claim 1, it is characterised in that：Described dosage homogenizer includes homogenizing
Piece（5）With homogenizing piece frame（6）, described homogenizing piece frame（6）Parcel homogenizing piece（5）Edge, dosage homogenizer cover simultaneously
It is fixed on ladle bowl（13）On beam channel exit；
Described homogenizing piece（5）For special-shaped axial symmetry entity structure, side is plane I, and opposite side is three-dimensional arc I, using z-axis as
Symmetry axis, is homogenized piece（5）The expression formula of three-dimensional arc I it is as follows：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point I on three-dimensional arc I；d u For plane I and radioactive source（1）Level away from
From；M u For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；μFor homogenizing piece（5）Material to γ line attenuation coefficient；θFor
Cambered surface point I, radioactive source（1）Line withzThe angle of axle,θ∈[-φ, φ]。
6. point-like radiation source device according to claim 1, it is characterised in that：Described dosage adjuster includes decay
Piece（7）, support（8）With attenuator frame（9）, described attenuator（7）Pass through support（8）It is placed in attenuator frame（9）In；Decline
Subtract piece（7）Quantity be 1 or multi-disc, attenuator（7）It is spaced apart；Attenuator（7）With radioactive source（1）Horizontal range is nearer,
Attenuation multiple is bigger.
7. point-like radiation source device according to claim 6, it is characterised in that：Described attenuator（7）It is real for the opposite sex
Body structure, side is plane II, and opposite side is three-dimensional arc II, using z-axis as symmetry axis, attenuator（7）The table of three-dimensional arc II
It is as follows up to formula：
Wherein：x、yWithzFor the three-dimensional coordinate of a cambered surface point II on three-dimensional arc II；d a For plane II and radioactive source（1）Away from
From；M a For the Scattering correction factor, intended calculating acquisition by illiteracy snap gauge；θFor cambered surface point II, radioactive source（1）Line withzThe folder of axle
Angle,θ∈[-φ, φ]；t a For attenuator（7）The corresponding attenuator of attenuation multiple（7）Material maximum gauge.
8. point-like radiation source device according to claim 1, it is characterised in that：Described radioactive source（1）Exist for energy
Single energy or accurate single energy point-like gamma ray radiator in the range of 600keV ~ 2MeV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720014191.6U CN206421035U (en) | 2017-01-06 | 2017-01-06 | A kind of point-like radiation source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720014191.6U CN206421035U (en) | 2017-01-06 | 2017-01-06 | A kind of point-like radiation source device |
Publications (1)
| Publication Number | Publication Date |
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| CN206421035U true CN206421035U (en) | 2017-08-18 |
Family
ID=59573654
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720014191.6U Expired - Fee Related CN206421035U (en) | 2017-01-06 | 2017-01-06 | A kind of point-like radiation source device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772549A (en) * | 2017-01-06 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of point-like radiation source device |
| CN112462408A (en) * | 2020-10-17 | 2021-03-09 | 中国工程物理研究院材料研究所 | Method for searching weak radioactive source in background by Bayesian analysis |
-
2017
- 2017-01-06 CN CN201720014191.6U patent/CN206421035U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772549A (en) * | 2017-01-06 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of point-like radiation source device |
| CN112462408A (en) * | 2020-10-17 | 2021-03-09 | 中国工程物理研究院材料研究所 | Method for searching weak radioactive source in background by Bayesian analysis |
| CN112462408B (en) * | 2020-10-17 | 2022-04-29 | 中国工程物理研究院材料研究所 | Method for searching weak radioactive source in background by Bayesian analysis |
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