CN109994243A - A kind of radioactive source and preparation method thereof - Google Patents
A kind of radioactive source and preparation method thereof Download PDFInfo
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- CN109994243A CN109994243A CN201910264531.4A CN201910264531A CN109994243A CN 109994243 A CN109994243 A CN 109994243A CN 201910264531 A CN201910264531 A CN 201910264531A CN 109994243 A CN109994243 A CN 109994243A
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- radioactive source
- radioactive
- source
- carbonate powder
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- 230000002285 radioactive effect Effects 0.000 title claims abstract description 145
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 72
- 239000000843 powder Substances 0.000 claims abstract description 66
- 239000000725 suspension Substances 0.000 claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 229920002799 BoPET Polymers 0.000 claims abstract description 25
- 239000003960 organic solvent Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-NJFSPNSNSA-N Carbon-14 Chemical group [14C] OKTJSMMVPCPJKN-NJFSPNSNSA-N 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 37
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 22
- 238000003760 magnetic stirring Methods 0.000 claims description 17
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 17
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 16
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical group [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- JGGQNNZJVBRCRP-UHFFFAOYSA-N OC(=O)O.[C] Chemical compound OC(=O)O.[C] JGGQNNZJVBRCRP-UHFFFAOYSA-N 0.000 claims 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 claims 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims 1
- 230000005250 beta ray Effects 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052799 carbon Inorganic materials 0.000 abstract description 13
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 238000005070 sampling Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 235000009161 Espostoa lanata Nutrition 0.000 description 1
- 240000001624 Espostoa lanata Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- RUFJMLKBWUXJMX-UHFFFAOYSA-N barium;carbonic acid Chemical group [Ba].OC(O)=O RUFJMLKBWUXJMX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002480 polybenzimidazole Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
- G21G4/00—Radioactive sources
- G21G4/04—Radioactive sources other than neutron sources
- G21G4/06—Radioactive sources other than neutron sources characterised by constructional features
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention relates to a kind of radioactive sources and preparation method thereof, belong to radioactive source preparation technical field.A kind of preparation method of radioactive source provided by the invention includes: that carbonate powder is added in organic solvent, the carbonate powder suspension being evenly distributed after stirring, and wherein the carbon in carbonate is carbon 14；The carbonate powder suspension and an at least adsorbed film of predetermined volume are taken, and the carbonate powder suspension of taken predetermined volume is uniformly applied on adsorbed film, to form radioactive source carrier；An at least organic film and aluminum plated PET film are taken, radioactive source carrier is sealed between organic film and aluminum plated PET film, to form source piece；An at least radioactive source shell is taken, source piece is packaged in radioactive source shell, that is, forms radioactive source.Preparation method of the invention is simple, radionuclide utilization rate is high, safe and reliable.Solve that the self-absorption of β ray is big, raw material is not easy to be uniformly mixed, seal the problems such as film shaking.
Description
Technical field
The present invention relates to a kind of radioactive sources and preparation method thereof, belong to radioactive source preparation technical field.
Background technique
Currently, PM2.5 has been listed in one of required test item of ambient air quality, and β ray automatic monitor is
Common PM2.5 monitoring device, can more accurately measure the concentration of PM2.5 in air.The half-life period of 14 nucleic of carbon is 5730
Year, and 14 nucleic of carbon can emit the pure beta ray that ceiling capacity is 156.5keV, the β ray that 14 nucleic of carbon is launched is in air
Maximum range be 22cm.Since 14 nucleic of carbon belongs to less toxic nucleic, people will not be damaged, 14 nucleic of carbon is supervised in PM2.5
It has been obtained and is widely applied in terms of surveying.
The principle that β ray automatic monitor monitors PM2.5 concentration is to launch β ray using carbon 14- radiator beta-ray, make
β ray pass through collect PM2.5 particulate matter filter membrane, by β ray pass through collect PM2.5 particulate matter filter membrane after decaying come
Analyze PM2.5 particle concentration.Wherein, the emissivity of carbon 14- radiator beta-ray is that the accuracy of influence PM2.5 monitoring result is important
Factor.
The customary preparation methods of carbon 14- β standard source are the methacrylic acid monomers for first preparing carbon 14, then aggregate into methyl
Methymethacrylate is coated on aluminium egative film and is made into organic film radioactive source by methacrylate.The β grain that carbon 14 emits
Sub- energy is low, and range is short, and the emissivity of the β particle of the radioactive source made of conventional method is lower, and organic film product-derived
Self-absorption it is big.The machine film product-derived made from conventional method makes β ray automatic monitor accurate to the monitoring of PM2.5
Property is restricted.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of radioactive sources and preparation method thereof.
A kind of radioactive source provided by the invention, including source piece 1 and radioactive source shell；The source piece includes organic film, aluminizes
PET film and radioactive source carrier, the radioactive source carrier are sealed between organic film and aluminum plated PET film；The radioactive source carries
Body includes the carbonate powder suspension being coated on adsorbed film and adsorbed film, and wherein the carbon in carbonate powder suspension is
Carbon 14；The radioactive source shell includes erecting bed 2 and shell 3；One end of the erecting bed 2 is provided with mounting surface；The shell 3
Including inner cavity, one end of the shell 3 is provided with the inner cavity towards the opening outside the shell 3, the shell 3 it is another
End is provided with emitter window；The organic film side of the source piece 1 is bonded on the mounting surface of the erecting bed by adhesive；The peace
Dress platform and shell are connected through a screw thread, and the aluminum plated PET film side of source piece that the erecting bed 2 is installed is towards the transmitting
Window.
Optionally, the radioactive activity of β particle is 10~250 μ Ci in the radioactive source.
Optionally, the outer dia of the radioactive source be 10~30 millimeters, and the radioactive source with a thickness of 2~7mm；Institute
The diameter for stating source piece is 6~25mm；The aluminum plated PET film with a thickness of 10~15 μm.
In addition, the present invention also provides a kind of preparation method of radioactive source, radioactive source preparation raw material used includes
Organic solvent and carbonate powder；Carbonate powder, the carbonate powder being evenly distributed after stirring are added in organic solvent
Last suspension, wherein the carbon in carbonate is carbon 14；Take the carbonate powder suspension and at least one of predetermined volume
Adsorbed film, and the carbonate powder suspension of taken predetermined volume is uniformly applied on the adsorbed film, to form radioactive source
Carrier；Take an at least organic film and aluminum plated PET film, by the radioactive source carrier be sealed in organic film and aluminum plated PET film it
Between, to form source piece；An at least radioactive source shell is taken, the source piece is packaged in the radioactive source shell, i.e., described in formation
Radioactive source.
Optionally, the determination method packet for taking predetermined volume described in the carbonate powder suspension of predetermined volume
It includes: obtaining the predetermined radioactive activity of β particle in the radioactive source to be prepared；Take a certain amount of carbonate powder suspended
Liquid measures the radioactive activity of β particle in a certain amount of carbonate powder suspension；According to a certain amount of carbonate
The radioactive activity of β particle calculates unit bodies in the volume of powder suspension and a certain amount of carbonate powder suspension
The radioactive activity of β particle in long-pending carbonate powder suspension；According to the predetermined radioactive activity of β particle in the radioactive source
The predetermined body of carbonate powder suspension is calculated with the radioactive activity of β particle in the carbonate powder suspension of unit volume
Product.
It optionally, further include being radiated to the source piece before the source piece being packaged in the radioactive source shell
Property activity measurement and pollution and leak check；The qualified source piece will be examined to be packaged in the source shell, described in being formed
Radioactive source.
Optionally, when carbonate powder being added in organic solvent, it is additionally added abrasive media, by stirring carbonate
Powder mull is to meeting scheduled granule size；The abrasive media includes the zirconium dioxide abrading-ball that diameter is 1~3 millimeter.
Optionally, instrument used in the preparation method includes: magnetic stirring apparatus, and the magnetic stirring apparatus is for holding
Raw material including organic solvent and carbonate powder, and there is agitating function；
And/or adjustable pipette, the adjustable pipette taking and shifting for carbonate powder suspension.
Optionally, radioactive source raw material used in the preparation method further includes abrasive media zirconium dioxide abrading-ball, and described two
The diameter of zirconium oxide balls is 1~3 millimeter, and the quantity of the zirconium dioxide abrading-ball is 5~20；The carbonate is carbonic acid
Barium, the radioactive activity of β particle is 1~100mCi in the barium carbonate；The organic solvent is acetone, and the volume of acetone is
0.5~3 milliliter；It is put into the radioactive source raw material in magnetic stirring apparatus, the revolving speed of magnetic stirring apparatus is set as per minute 300
~500 turns, and the radioactive source raw material is stirred 20~40 minutes.
Optionally, when the predetermined radioactive activity of β particle is 100 μ Ci in the radioactive source to be prepared, radiation used
Source raw material include: the radioactive activity of β particle be 20mCi barium carbonate, 2 milliliters of acetone, 10 diameters be 1 millimeter dioxy
Change zirconium abrading-ball, the zirconium dioxide abrading-ball that 5 diameters are 3 millimeters；The radioactive source raw material is put into magnetic stirring apparatus, by magnetic force
The revolving speed of blender is set as 350 turns per minute, and the radioactive source raw material is stirred 30 minutes.
A kind of radioactive source provided by the invention and preparation method thereof guarantees in terms of the selection of raw material and preparation process two
The high emissivity of the β particle of prepared radioactive source, and prepared radioactive source have the advantages that it is cheap, high-quality.This
The preparation method of invention is simple, radionuclide utilization rate is high, safe and reliable.Solve that the self-absorption of β ray is big, raw material is not easy to mix
Close the problems such as uniform, sealing film shakes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of radioactive source of the present invention；
Fig. 2 is the flow diagram of the preparation method of radioactive source provided by the embodiment；
Fig. 3 is the flow diagram of the determination method of predetermined volume in carbonate powder suspension provided by the embodiment.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, and embodiment is being with technical solution of the present invention
Under the premise of implemented, it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
A kind of radioactive source provided in this embodiment, including source piece and radioactive source shell；Source piece includes organic film, aluminum plated PET
Film and radioactive source carrier, radioactive source carrier are sealed between organic film and aluminum plated PET film；Radioactive source carrier includes adsorbed film
With the carbonate powder suspension being coated on adsorbed film, wherein the carbon in carbonate powder suspension is carbon 14；Radioactive source
Shell includes erecting bed and shell；One end of erecting bed is provided with mounting surface；Shell includes inner cavity, and one end of shell is provided with interior
For chamber towards the opening of shell exterior, the other end of shell is provided with emitter window；The organic film side of source piece is bonded in by adhesive
On the mounting surface of erecting bed；Erecting bed and shell are connected through a screw thread, and the aluminum plated PET film side of the source piece of erecting bed installation
Towards emitter window；
Illustratively, the material of radioactive source shell, i.e. erecting bed and shell can for the metal materials such as stainless steel or aluminium or
Person's alloy material.Emitter window is the opening to match with the shapes and sizes of source piece.
Organic film refers to that artificial synthesized membrane material is the artificial synthesized film of organic material, and the material of organic film can be
Cellulose derivative class, polysulfones, polyamide-based, polyimide, polyesters, polyolefins and silicon-containing polymer and fluorine-containing poly-
Close object etc..The material of organic film can be preferably PET material, because organic film in the present embodiment requires certain change
Learn stability and thermal stability, a kind of preferably selection of when PET material.Pet material, the entitled Polyethylene of English
Terephthalate is commonly called as polyester resin, is most important kind in thermoplastic polyester.
Aluminum plated PET film is that a thin layer of aluminium atom is stacked into high-quality PET film by vacuum aluminium plating process
The barrier film of formation has excellent gas and light barrier property and good moisture-proof, heat-resisting, puncture resistance.It puts
When penetrating source carrier and being sealed between organic film and aluminum plated PET film, it can be sealed using EVA sealing material.
It has the characteristics that strong adsorption capacity, organic solvent-resistant and porosity for adsorbed film major requirement, wherein adsorbing
Membrane material is preferably cotton fibre.
In carbonate powder suspension the carbonated starting material of common carbon 14 mainly have barium carbonate, sodium carbonate and calcium carbonate this
Three kinds of forms, wherein the thermal stability of barium carbonate is better than other two kinds of carbonate, and the cost of material of barium carbonate is relatively inexpensive.This
It can be preferably barium carbonate by the carbonate in carbonate powder suspension in embodiment.
Wherein adhesive can be epoxy resin, phenolic resin, Lauxite, melamine-formaldehyde resin, organosilicon tree
Rouge, furane resins, unsaturated polyester (UP), acrylic resin, polyimides, polybenzimidazoles, phenolic aldehyde-Pioloform, polyvinyl acetal, phenolic aldehyde-
The heat curing types adhesives such as the classes such as polyamide, phenolic aldehyde-epoxy resin, epoxy-polyamide are glued with forming insoluble, insoluble solid-state
Layer and achieve the purpose that splicing.And heat curing type adhesive adhesive strength with higher, and heat-resisting, ageing-resistant, resistant to chemical media
It is excellent.
Radiation window material is preferably also aluminum plated PET film, the on the one hand transmitting to the β particle of radioactive source of aluminum plated PET film
Rate influence is small, and has excellent gas and light barrier property and good moisture-proof, heat-resisting, puncture resistance.
Optionally, the radioactive activity of β particle is 10~250 μ Ci in radioactive source.
Illustratively, the radioactive activity of β particle is 10~250 μ Ci in radioactive source, refers to the side according to the present embodiment
The radioactive activity of the β particle of the radioactive source of method preparation should reach 10~250 μ Ci, to meet β ray automatic monitor prison
Survey the requirement of PM2.5 concentration.
Optionally, the outer dia of radioactive source be 10~30 millimeters, and radioactive source with a thickness of 2~7mm；The diameter of source piece
For 6~25mm；Aluminum plated PET film with a thickness of 10~15 μm.
Illustratively, selecting with a thickness of 10 μm~15 μm of aluminizer is to need to carry out radioactive substance due to radioactive source
Sealing, but what carbon 14 emitted at the same time is low energy beta rays that energy is 156.467keV, and thickness crosses conference and shields a large amount of β
Ray causes the decline of radionuclide utilization rate.
In addition, radioactive source prepares used as shown in Figure 1, the present embodiment additionally provides a kind of preparation method of radioactive source
Raw material includes organic solvent and carbonate powder；
S1, carbonate powder is added in organic solvent, the carbonate powder suspension being evenly distributed after stirring,
Carbon in middle carbonate is carbon 14；
S2, the carbonate powder suspension for taking predetermined volume and an at least adsorbed film, and by the carbonic acid of taken predetermined volume
Salt powder suspension is uniformly applied on adsorbed film, to form radioactive source carrier；
S3, an at least organic film and aluminum plated PET film are taken, radioactive source carrier is sealed in organic film and aluminum plated PET film
Between, to form source piece；
S4, an at least radioactive source shell is taken, source piece is packaged in radioactive source shell, that is, forms radioactive source.
Illustratively, being constantly in the state being stirred after addition carbonate powder in organic solvent is to guarantee it
In relatively uniform suspended liquid status, it can be allowed uniformly to be spread when suspension is transferred to carrier, to guarantee to put
The uniformity in source is penetrated, the consistency of same batch products can also be improved.
The organic solvent of the present embodiment can choose as acetone, dehydrated alcohol, isopropanol, ether etc..From volatility, safety
Under comprehensively considering from the aspect of property, toxicity, the present embodiment can choose acetone as preferable organic solvent.
Optionally, as shown in Fig. 2, taking the determination method packet of predetermined volume in the carbonate powder suspension of predetermined volume
It includes:
S201, the predetermined radioactive activity for obtaining β particle in radioactive source to be prepared；
S202, a certain amount of carbonate powder suspension is taken, measures β particle in a certain amount of carbonate powder suspension
Radioactive activity；
S203, according to β in the volume of a certain amount of carbonate powder suspension and a certain amount of carbonate powder suspension
The radioactive activity of particle calculates the radioactive activity of β particle in the carbonate powder suspension of unit volume；
S204, according to β in the predetermined radioactive activity of β particle in radioactive source and the carbonate powder suspension of unit volume
The radioactive activity of particle calculates the predetermined volume of carbonate powder suspension.
Optionally, before source piece being packaged in radioactive source shell, further include to source piece carry out activity measurement and
Pollution and leak check；Qualified source piece will be examined to be packaged in the shell of source, to form radioactive source.
Illustratively, it pollutes and reveals to examine and be all made of wiping sampling method progress.When sampling, a piece end band of sampling person
There is a kind of sampling rod of inert material (usually absorbent cotton or the like) to be wiped.Usually being pressed on one side sampling cotton swab
On sample point, radioactive source surface is slowly effectively wiped, the another side for then sampling cotton swab is wiped.The area of sample point is
It is unfixed, it can be changed according to the type difference of equipment.Use putting on liquid scintillation counter measurement wiping cotton balls
Penetrating property activity, it is qualification that testing result, which is less than 200Bq,.Leak check be surface contamination after the assay was approved, place 7 days, then to putting
The source of penetrating is wiped, and it is qualification that cleaning piece, which does not have radioactive substance,.
Optionally, when carbonate powder being added in organic solvent, it is additionally added abrasive media, by stirring carbonate
Powder mull is to meeting scheduled granule size；Abrasive media includes the zirconium dioxide abrading-ball that diameter is 1~3 millimeter.
Illustratively, when carbonate powder being added in organic solvent, it is additionally added abrasive media, and be constantly in and be stirred
State, be in order to which smaller particle can be become by the contact with abrading-ball, can be with to guarantee the uniformity of radioactive source
Improve the consistency of same batch products.
Optionally, instrument used in preparation method includes: magnetic stirring apparatus, and magnetic stirring apparatus is for holding including organic
Raw material including solvent and carbonate powder, and there is agitating function；
And/or adjustable pipette, adjustable pipette taking and shifting for carbonate powder suspension.
Optionally, radioactive source raw material used in preparation method further includes abrasive media zirconium dioxide abrading-ball, zirconium dioxide mill
The diameter of ball is 1~3 millimeter, and the quantity of zirconium dioxide abrading-ball is 5~20；Carbonate is barium carbonate, β particle in barium carbonate
Radioactive activity is 1~100mCi；Organic solvent is acetone, and the volume of acetone is 0.5~3 milliliter；It is put in magnetic stirring apparatus
Enter radioactive source raw material, the revolving speed of magnetic stirring apparatus is set as 300~500 turns per minute, and radioactive source raw material is stirred 20~
40 minutes.
Optionally, when the predetermined radioactive activity of β particle is 100 μ Ci in radioactive source to be prepared, radioactive source used is former
Material include: the radioactive activity of β particle be 20mCi barium carbonate, 2 milliliters of acetone, 10 diameters be 1 millimeter zirconium dioxide
The zirconium dioxide abrading-ball that abrading-ball, 5 diameters are 3 millimeters；Radioactive source raw material is put into magnetic stirring apparatus, by magnetic stirring apparatus
Revolving speed is set as 350 turns per minute, and radioactive source raw material is stirred 30 minutes.
A kind of radioactive source provided in this embodiment and preparation method thereof is protected in terms of the selection of raw material and preparation process two
The high emissivity of the β particle of the prepared radioactive source of card, and prepared radioactive source have the advantages that it is cheap, high-quality.
Preparation method of the invention is simple, radionuclide utilization rate is high, safe and reliable.
The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of radioactive source, it is characterised in that:
The radioactive source includes source piece and radioactive source shell；
The source piece includes organic film, aluminum plated PET film and radioactive source carrier, and the radioactive source carrier is sealed in organic film and plating
Between aluminium PET film；The radioactive source carrier includes the carbonate powder suspension being coated on adsorbed film and adsorbed film, wherein carbon
Carbon in hydrochlorate powder suspension is carbon 14；
The radioactive source shell includes erecting bed and shell；One end of the erecting bed is provided with mounting surface；The shell includes
Inner cavity, one end of the shell are provided with the inner cavity towards the opening of the shell exterior, and the other end of the shell is arranged
There is emitter window；
The organic film side of the source piece is bonded on the mounting surface of the erecting bed by adhesive；The erecting bed and shell are logical
Cross threaded connection, and the aluminum plated PET film side of the source piece of erecting bed installation is towards the emitter window.
2. radioactive source according to claim 1, it is characterised in that:
The radioactive activity of β particle is 10~250 μ Ci in the radioactive source.
3. radioactive source according to claim 2, it is characterised in that:
The outer dia of the radioactive source be 10~30 millimeters, and the radioactive source with a thickness of 2~7mm；
The diameter of the source piece is 6~25mm；
The aluminum plated PET film with a thickness of 10~15 μm.
4. a kind of preparation method of radioactive source, it is characterised in that:
Radioactive source preparation raw material used includes organic solvent and carbonate powder；
Carbonate powder is added in organic solvent, the carbonate powder suspension being evenly distributed after stirring, wherein carbonic acid
Carbon in salt is carbon 14；
Take the carbonate powder suspension and an at least adsorbed film of predetermined volume, and by the carbonate powder of taken predetermined volume
Last suspension is uniformly applied on the adsorbed film, to form radioactive source carrier；
Take an at least organic film and aluminum plated PET film, by the radioactive source carrier be sealed in organic film and aluminum plated PET film it
Between, to form source piece；
An at least radioactive source shell is taken, the source piece is packaged in the radioactive source shell, that is, forms the radioactive source.
5. the preparation method according to claim 4, it is characterised in that:
The determination method for taking predetermined volume described in the carbonate powder suspension of predetermined volume includes:
Obtain the predetermined radioactive activity of β particle in the radioactive source to be prepared；
A certain amount of carbonate powder suspension is taken, β particle in a certain amount of carbonate powder suspension is measured
Radioactive activity；
According to β in the volume of a certain amount of carbonate powder suspension and a certain amount of carbonate powder suspension
The radioactive activity of son calculates the radioactive activity of β particle in the carbonate powder suspension of unit volume；
According to β particle in the carbonate powder suspension of the predetermined radioactive activity of β particle in the radioactive source and unit volume
Radioactive activity calculate carbonate powder suspension predetermined volume.
6. the preparation method according to claim 4, it is characterised in that:
Before the source piece is packaged in the radioactive source shell, further include to the source piece carry out activity measurement and
Pollution and leak check；
The qualified source piece will be examined to be packaged in the source shell, to form the radioactive source.
7. the preparation method according to claim 4, it is characterised in that:
When carbonate powder being added in organic solvent, it is additionally added abrasive media, to be ground to carbonate powder by stirring
Meet scheduled granule size；
The abrasive media includes the zirconium dioxide abrading-ball that diameter is 1~3 millimeter.
8. the preparation method according to claim 4, which is characterized in that instrument used in told preparation method includes:
Magnetic stirring apparatus, the magnetic stirring apparatus is used to hold the raw material including organic solvent and carbonate powder, and has
There is agitating function；
And/or adjustable pipette, the adjustable pipette taking and shifting for carbonate powder suspension.
9. the preparation method according to claim 4, it is characterised in that:
Radioactive source raw material used in the preparation method further includes abrasive media zirconium dioxide abrading-ball, the zirconium dioxide abrading-ball
Diameter is 1~3 millimeter, and the quantity of the zirconium dioxide abrading-ball is 5~20；
The carbonate is barium carbonate, and the radioactive activity of β particle is 1~100mCi in the barium carbonate；
The organic solvent is acetone, and the volume of acetone is 0.5~3 milliliter；
It is put into the radioactive source raw material in magnetic stirring apparatus, the revolving speed of magnetic stirring apparatus is set as per minute 300~500
Turn, and the radioactive source raw material is stirred 20~40 minutes.
10. the preparation method according to claim 4, it is characterised in that:
When the predetermined radioactive activity of β particle is 100 μ Ci in the radioactive source to be prepared, radioactive source raw material used includes:
Zirconium dioxide abrading-ball that barium carbonate that the radioactive activity of β particle is 20mCi, 2 milliliters of acetone, 10 diameters are 1 millimeter, 5
The zirconium dioxide abrading-ball that a diameter is 3 millimeters；
It is put into the radioactive source raw material in magnetic stirring apparatus, the revolving speed of magnetic stirring apparatus is set as 350 turns per minute, and will
The radioactive source raw material stirs 30 minutes.
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| CN201910264531.4A CN109994243B (en) | 2019-04-03 | 2019-04-03 | Radioactive source and preparation method thereof |
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Cited By (3)
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| CN110412643A (en) * | 2019-08-05 | 2019-11-05 | 核工业航测遥感中心 | The design method of aeroradiometric survey Main Regulator complex element model |
| CN113436775A (en) * | 2021-06-23 | 2021-09-24 | 中国核动力研究设计院 | Method for preparing substrate-free ultrathin nickel-63 radioactive source |
| CN116517526A (en) * | 2023-04-12 | 2023-08-01 | 安徽中核桐源科技有限公司 | Radioisotope tracer and preparation method thereof |
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| CN109994243B (en) | 2024-07-30 |
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