CN221079640U - Beta plane source - Google Patents
Beta plane source Download PDFInfo
- Publication number
- CN221079640U CN221079640U CN202323168616.3U CN202323168616U CN221079640U CN 221079640 U CN221079640 U CN 221079640U CN 202323168616 U CN202323168616 U CN 202323168616U CN 221079640 U CN221079640 U CN 221079640U
- Authority
- CN
- China
- Prior art keywords
- source
- beta
- utility
- model
- film
- 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.)
- Active
Links
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000011888 foil Substances 0.000 claims abstract description 20
- 229920002799 BoPET Polymers 0.000 claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000005030 aluminium foil Substances 0.000 claims description 2
- 230000002285 radioactive effect Effects 0.000 abstract description 21
- 239000002245 particle Substances 0.000 abstract description 15
- 238000001179 sorption measurement Methods 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 13
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 239000012086 standard solution Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 230000005855 radiation Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 235000009161 Espostoa lanata Nutrition 0.000 description 3
- 240000001624 Espostoa lanata Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000941 radioactive substance Substances 0.000 description 3
- 238000009210 therapy by ultrasound Methods 0.000 description 3
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- -1 (modified acrylic ester Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model relates to the technical field of beta radioactive sources, in particular to a beta plane source. The beta plane source comprises a source core, a source shell and a gasket; the source core is encapsulated in the source shell and the gasket and comprises a PET film, a radionuclide, an EVA film and an aluminum foil which are sequentially stacked; an active area opening is formed in the top of the source shell; the aluminum foil is connected with the top of the source housing, and the PET film is connected with the gasket. The beta plane source provided by the utility model has good universality on nuclides, and has the advantages of small beta particle loss, high firmness, good uniformity and the like.
Description
Technical Field
The utility model relates to the technical field of beta radioactive sources, in particular to a beta plane source.
Background
Beta radiation source has short range, and beta particles can not reach the detector due to self absorption and support absorption, so that the detection efficiency is affected, and the beta radiation source is generally manufactured by adopting an aluminum oxide layer micropore adsorption method. The microporous adsorption process of aluminum oxide layer includes first etching aluminum support with H 2SO4 to form porous alumina film, then adsorbing radioactive matter onto the alumina film and final sealing treatment. The aluminium oxide layer microporous adsorption method has the advantages of simple equipment, convenient operation, lower cost and wide applicable nuclide range. However, the microporous adsorption method of the aluminum oxide film has the problems of low quality of the aluminum oxide film, difficult quantification in the adsorption process, difficult sealing of the aluminum oxide film, serious absorption of the aluminum oxide film and the like. The preparation and application of radioactive source published by atomic energy publishing society discloses that H 2SO4 corrodes an aluminum support sheet to form a porous alumina film, radioactive substances are adsorbed on the alumina film, an organic film is coated on the surface of the alumina film to prevent radioactive metal ions from exuding, and the problems that the alumina film is corroded, the pore structure is disordered and the organic film peels off after a period of use to cause exudation of the radioactive substances exist. The preparation of beta plane source and its measurement by oxidation adsorption method published in the 6 th period of the modern measurement and laboratory management in 2003 discloses that hydrochloric acid corrodes an aluminum negative film to form a porous alumina film, then a sampler absorbs the prepared adsorption liquid and uniformly drops the adsorption liquid on an active area of an aluminum sheet, finally a muffle furnace burns to improve the adsorption firmness of radioactive substances on the surface of the aluminum sheet, the effect of corrosion of aluminum by hydrochloric acid is uncontrollable, the pore structure of the alumina film is disordered, and the sampler drops to adsorb unevenly and the muffle furnace burns to destroy the structure of the alumina film, thereby reducing the strength of the alumina film.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a beta plane source.
Specifically, the beta plane source of the utility model comprises a source core, a source shell and a gasket; the source core is encapsulated in the source shell and the gasket and comprises a PET film, a radionuclide, an EVA film and an aluminum foil which are sequentially stacked; an active area opening is formed in the top of the source shell; the aluminum foil is connected with the top of the source housing, and the PET film is connected with the gasket. The beta plane source provided by the utility model has good universality on nuclides, and the prepared beta plane source has the advantages of small beta particle loss, high firmness, good uniformity and the like.
As a preferred embodiment, the PET film has a thickness of 55 to 125. Mu.m.
In a further preferred embodiment, the thickness of the radionuclide is 0.1-3.6 nm.
Further preferred embodiments, the EVA film has a thickness of 15+ -5 μm.
In a further preferred embodiment, the thickness of the aluminum foil is 5 to 15 μm.
Further preferred embodiments, the spacer is attached to the PET film; the diameter of the gasket is 20-60 mm; the height of the gasket is 1-5 mm.
Further preferred embodiments, the height of the source housing is 2-6 mm, and the thickness of the top of the source housing is 1-1.5 mm; the outer diameter of the source shell is 22-68 mm.
In a further preferred embodiment, the diameter of the active area opening is 10 to 50mm.
In a further preferred embodiment, the diameter of the source core is 20-60 mm.
In a further preferred embodiment, the radionuclide has a diameter of 10 to 50mm.
In a further preferred embodiment, the source housing and the spacer are made of aluminum.
The utility model has the advantages that: 1) The utility model does not need to prepare a high-quality oxide film; 2) The planar source has small beta particle loss, high firmness and good uniformity; 3) The covering layer (such as 15 mu m thick EVA film and 5 mu m thick aluminum foil) is thinner, the blocking rate is low, and the energy loss of nuclide is small; 4) The double sealing method of the aluminum foil and the EVA film is created, wherein the first step is that the EVA film can firmly fix the radionuclide after melting, and the second step is that the EVA films firmly adhere together, and the aluminum foil prevents the radionuclide from dissolving out; 5) The beta plane source is suitable for most nuclides (except for volatile nuclides) and has good universality.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the prior art, reference will be made to the accompanying drawings which are required to be used in the description of the embodiments or the prior art, wherein like elements or parts are generally identified by like reference numerals throughout. In the drawings, elements or portions thereof are not necessarily drawn to scale. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic diagram of a β -plane source in an embodiment of the utility model;
FIG. 2 is a schematic view of the structure of a source core and a planar source in an embodiment of the present utility model;
FIG. 3 is a schematic view of the source housing and gasket construction in accordance with an embodiment of the present utility model;
FIG. 4 is a graph showing the relationship between uniformity and evaporating water bath temperature in an embodiment of the present utility model;
FIG. 5 is a graph showing the relationship between uniformity and evaporating liquid pH in the embodiment of the present utility model;
FIG. 6 is a graph of uniformity versus water volume ratio for an embodiment of the present utility model;
In the figure, the source core is-100; PET film-101; radionuclide-102; EVA film-103; aluminum foil-104; source shell-201; a spacer-202; active area opening-203.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model. Modifications and substitutions to methods, procedures, or conditions of the present utility model without departing from the spirit and nature of the utility model are intended to be within the scope of the present utility model.
The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. All reagents or instrumentation are conventional products available for purchase by regular vendors, not noted to the manufacturer.
The materials, equipment and reagents used in some examples of the utility model are shown in tables 1 and 2.
Materials and apparatus used in Table 1
TABLE 2 reagents
| Reagent(s) | Purity/specific activity |
| 137 Cs feed liquid | 100～200μCi/mL |
| Ethanol | Analysis of alcohols |
| Na2HPO3 | AR |
| NaH2PO3 | AR |
The utility model will be further described with reference to the following examples:
This embodiment provides a beta planar source having the structure shown in fig. 1-3, comprising a source core 100, a source housing 201, and a spacer 202; the source core 100 is encapsulated in the source shell 201 and the gasket 202, and the source core 100 comprises a PET film 101, a radionuclide 102, an EVA film 103 and an aluminum foil 104 which are sequentially stacked; the top of the source housing 201 is provided with an active area opening 203; the aluminum foil 104 is attached to the top of the source housing 201 and the PET film 101 is attached to the spacer 202.
As a preferred embodiment, the thickness of the PET film 101 is 55 to 125 μm; the thickness of the radionuclide 102 is 0.1-3.6 nm; the thickness of the EVA film 103 is 15+/-5 mu m; the thickness of the aluminum foil 104 is 5-15 μm.
Further preferred embodiments, the spacer 202 is attached to the PET film 101; the diameter of the gasket 202 is 20-60 mm; the height of the gasket 202 is 1-5 mm; the height of the source shell 201 is 2-6 mm, and the thickness of the top of the source shell 101 is 1-1.5 mm; the source housing 201 has an outer diameter of 22-68 mm.
Further preferred embodiments, the diameter of the active area opening 203 is 10-50 mm; the source core 100 has a diameter of 20 to 60mm and the radionuclide 102 has a diameter of 10 to 50mm.
In a further preferred embodiment, the material of the source housing 101 and the spacer 202 is aluminum.
The embodiment of the utility model also provides a preparation method of the beta plane source, which comprises the following steps:
1) Clean evaporation tank
The inner wall of the evaporation tank is wiped by alcohol cotton balls for three times to remove impurities and pollutants in the evaporation tank.
2) Preparation of standard solution
The standard solution is prepared from 0.1M Na 2HPO4、0.1M NaH2PO4, ethanol and radioactive feed liquid;
Preparation of 0.1M Na 2HPO4: 14.2g of Na 2HPO4 was dissolved in 1L of deionized water.
Preparation of 0.1M NaH 2PO4: 12g of NaH 2PO4 was dissolved in 1L of deionized water.
TABLE 3 formulation ratio of standard solutions
3) Source core preparation
Placing a 55um thick PET film at the bottom of the evaporation tank, screwing a bottom cover of the evaporation tank, preparing a certain amount of standard solution, adding the standard solution into the evaporation tank, then placing the evaporation tank in ultrasonic waves for ultrasonic dispersion for 10min, wherein the ultrasonic frequency is 30-40 Hz, and then transferring the evaporation tank into a water bath kettle for water bath at 60 ℃ until the solvent is evaporated to dryness. And then taking out the PET film, placing a layer of EVA film with the thickness of 15 mu m on the PET film, placing a layer of aluminum foil with the thickness of 5 mu m on the EVA film, and then placing the EVA film into a heat sealing machine for treatment, wherein the three materials are tightly combined to obtain the source core.
4) Source housing
The surface of the source core is gently wiped clockwise by an alcohol cotton ball for 6 circles, the source core with proper surface particle number after decontamination is filled into a corresponding source shell, and a small amount of glue (modified acrylic ester adhesive) is coated in the source shell before the source core is filled into the shell so as to prevent the support piece from sliding in the source sleeve.
5) Decontamination
The alcohol cotton ball is used for wiping the plane source, removing the surface pollution and airing.
6) Inspection of
Appearance inspection: the surface is smooth and flat, and no damage occurs.
Surface emissivity test: the radioactive source is measured and given by a multi-wire proportional counter after the standard source of the national legal metering department is scaled. And (3) injection: the total count of measurement is more than 10 4 cpm, otherwise the measurement time is prolonged to reduce the measurement statistical error.
The structure of the above-mentioned β -plane source prepared in this example is shown in fig. 1. The source is in a flat plate shape, the emitting surface is divided into an active area and an inactive area, and the active area partially emits beta particles. The source core is obtained by heat sealing a PET film, an EVA film and an aluminum foil, the source shell and the gasket are made of aluminum, and the source is in a flat plate shape. The source core (containing radioactivity) is firmly bonded to the source housing. The following tests were performed on the beta plane source prepared by the method provided by the example of the present utility model:
1. Water bath temperature test of evaporating solution (standard solution)
The uniformity of the beta plane source characterizes the quality characteristics of the prepared radioactive source and is the most important performance index. The utility model adopts a self-made measuring device to measure the uniformity of the radioactive source, the device consists of a stainless steel base and an upper cover, the upper cover is opened at an angle of 30 degrees, the upper cover can rotate on the base, and scale marks are carried out on the edge of the base. A block was extracted from the prepared radioactive source and the uniformity was measured. The radiation source is measured for counting in 12 areas, each area is measured for three times to average, the measurement time of each measurement area is 60s, and finally the relative standard deviation of the counting of the 12 areas is calculated. The embodiment of the utility model prepares the plane source respectively at the water bath temperature of 20 ℃, 30 ℃, 40 ℃, 50 ℃ and 60 ℃ (note: the size of the experimental source isThe nuclide was Cs-137) and then measured to obtain a relative standard deviation, the lower the relative standard deviation, the better the uniformity, the relative standard deviation and the evaporating liquid bath temperature are related as shown in fig. 4.
2. Evaporation pH experiment
The embodiment of the utility model prepares plane sources when the pH of the evaporating liquid is 5, 6, 7, 8 and 9 (note: the size of the experimental source isThe nuclide was Cs-137) and then measured for relative standard deviation, the relative standard deviation and the evaporation pH were as shown in fig. 5.
3. Experiment of Water addition amount
The embodiment of the utility model prepares a planar source with the volume ratio of water in the evaporating liquid of 5%, 10%, 20%, 30% and 40% (note: the size of the experimental source is thatThe nuclide is Cs-137) and then measured for relative standard deviation, the relative standard deviation and water volume ratio are shown in fig. 6.
4. Barrier experiments on beta particles
And measuring the activity of the standard solution before adsorption and the activity of the standard solution after adsorption by adopting a liquid flash instrument, and calculating the actual adsorption quantity of the planar source. The emissivity of the planar source is measured with a gas-flowing type large-area alpha and beta measuring instrument, and then the blocking rate of beta particles is calculated to be = (activity of raw material liquid adsorbed by the planar source is 30-actual emissivity of the planar source)/activity of raw material liquid adsorbed by the planar source is 30. In the embodiment of the utility model, as a beta plane source for comparison of aluminum oxide film adsorption, the traditional preparation process adopting an aluminum oxide film adsorption method is adopted for preparation: step 1) the cleaned aluminum bracket is installed in an electroplating bath, and then 20% H 2SO4 is added to corrode the aluminum bracket to form a porous aluminum oxide film. And 2) placing the aluminum support sheet into an adsorption tank similar to an electroplating tank, adsorbing the radionuclide by an aluminum oxide film, and coating an organic film on the surface to seal after the radionuclide is adsorbed.
Table 4 blocking ratio experimental data for beta particles
Note that: the experimental source has the following dimensionsThe nuclide is Cs-137.
5. Source core firmness inspection
(1) Fastness inspection of source core after heat sealing by EVA film and aluminum foil
The surface emissivity of the source core after the EVA film and the aluminum foil are heat sealed is measured, the source core after the EVA film and the aluminum foil are sealed is placed in deionized water for ultrasonic treatment for 3min, and then the source core is taken out and dried, and the surface emissivity is measured.
Table 5 firmness test results for EVA film and aluminum foil heat sealed beta plane source
| Treatment of radioactive sources | Number of surface particle emissions |
| Source core after EVA film and aluminium foil sealing | 6.25X10 4 particles/2pi.min |
| The source core is placed in deionized water for ultrasonic treatment for 3min | 6.24X10 4 particles/2pi.min |
Note that: the experimental source has the following dimensionsThe nuclide is Cs-137
(2) Radiation source firmness test for aluminum oxide film adsorption preparation
TABLE 6 adsorption firmness test results for aluminum oxide film adsorbed beta plane source
| Treatment of radioactive sources | Number of surface particle emissions |
| Radioactive source after oxide film sealing treatment | 6.94X10 4 particle count/2pi.min |
| The radioactive source is placed in deionized water for ultrasonic treatment for 3min | 3.13X10 4 particles/2pi.min |
Note that: the experimental source has the following dimensionsThe nuclide is Cs-137
6. Source sheet uniformity inspection
The uniformity of the radiation source characterizes the quality characteristics of the radiation source produced. The uniformity of the radioactive source prepared in the embodiment 1 is measured by adopting a self-made measuring device, wherein the self-made measuring device consists of a stainless steel base and an upper cover, the upper cover is opened at an angle of 30 degrees, the upper cover can rotate on the base, and scale marks are formed on the edge of the base. A block was extracted from the prepared radioactive source and the uniformity was measured. The radiation source is measured for counting in 12 areas, each area is measured for three times to average, the measurement time of each measurement area is 60s, and finally the relative standard deviation of the counting of the 12 areas is calculated.
TABLE 7 uniformity test results of radioactive sources
Wherein, the 1 # radioactive source is the radioactive source after EVA film and aluminum foil are sealed; the 2 # radioactive source is a radioactive source prepared by adsorption of aluminum oxide film
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A beta planar source, wherein the beta planar source comprises a source core, a source shell, and a spacer; the source core is encapsulated in the source shell and the gasket and comprises a PET film, a radionuclide, an EVA film and an aluminum foil which are sequentially stacked; an active area opening is formed in the top of the source shell; the aluminum foil is connected with the top of the source housing, and the PET film is connected with the gasket.
2. The beta planar source of claim 1, wherein the PET film has a thickness of 55-125 μιη.
3. The β -plane source of claim 2 wherein said EVA film has a thickness of 15±5 μm.
4. A β -plane source as claimed in claim 3 wherein the aluminium foil has a thickness of 5 to 15 μm.
5. The beta planar source of any one of claims 1-4, wherein the radionuclide has a thickness of 0.1-3.6 nm.
6. The beta planar source of claim 1, wherein the spacer is connected to the PET film; the diameter of the gasket is 20-60 mm; the height of the gasket is 1-5 mm.
7. The beta planar source of claim 1, wherein the height of the source housing is 2-6 mm and the thickness of the top of the source housing is 1-1.5 mm; the outer diameter of the source shell is 22-68 mm.
8. The beta planar source of any one of claims 1-4, wherein the active region opening has a diameter of 10-50 mm.
9. The beta planar source of claim 8, wherein the source core has a diameter of 20-60 mm.
10. The beta planar source of claim 9, wherein the radionuclide has a diameter of 10-50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323168616.3U CN221079640U (en) | 2023-11-23 | 2023-11-23 | Beta plane source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323168616.3U CN221079640U (en) | 2023-11-23 | 2023-11-23 | Beta plane source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221079640U true CN221079640U (en) | 2024-06-04 |
Family
ID=91255921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323168616.3U Active CN221079640U (en) | 2023-11-23 | 2023-11-23 | Beta plane source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221079640U (en) |
-
2023
- 2023-11-23 CN CN202323168616.3U patent/CN221079640U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Veall | A Geiger-Muller counter for measuring the beta-ray activity of liquids, and its application to medical tracer experiments | |
| CN221079640U (en) | Beta plane source | |
| WO2018171097A1 (en) | Method for obtaining calibration dust membrane by treating filter membrane and method for carrying out off-site calibration by calibration dust membrane | |
| CN110702802A (en) | Method for passively monitoring antibiotic content in aquaculture water in situ | |
| CN117809879A (en) | Beta plane source and preparation method thereof | |
| CN101593567A (en) | 68The preparation method of Ge sealed radioactive source | |
| Hensley | Adsorption of Tagged Phosphute Ions on Glass Surfaces as Related to Alkaline Attack | |
| CN111398127A (en) | Method for testing porosity of lithium ion battery pole piece | |
| CN108873055B (en) | Instillation method of radioactive aerosol filter membrane standard source | |
| CN115683977A (en) | Device and method for measuring radon adsorption saturation coefficient of activated carbon | |
| CN113409972B (en) | Nuclear fuel burnup measuring process | |
| CN114235674A (en) | Method for testing and evaluating corrosion resistance of packaging adhesive film for photovoltaic module | |
| Dash et al. | On the application of electrochemical techniques for the preparation of 57Co source core, encapsulation and quality evaluation for radiometric assay of nuclear fuel rods | |
| CN209416951U (en) | A kind of x-ray photoelectron spectroscopy powder sample quick preparation device | |
| CN220663137U (en) | A partial shipment equipment for radioactive liquid | |
| CN216433831U (en) | Solvent trap for rheological test of fuel cell catalyst slurry | |
| CN205659690U (en) | Pitch thin film heating test is with flourishing appearance ware | |
| CN217112141U (en) | Sample wafer for measuring content of each metal element in proton exchange membrane catalyst by XRF (X-ray fluorescence) | |
| CN105170116A (en) | Preparation method of polyurethane sampling plate and passive adsorption sampling and detection method of organic phosphorus flame retardant | |
| CN220552986U (en) | Film scintillator flashing fixture | |
| CN214624459U (en) | Beta plane source | |
| CN112967830B (en) | Beta plane source preparation method and beta plane source | |
| CN219495887U (en) | Mycotoxin detection device for medicinal material pseudo-ginseng | |
| EP2832443B1 (en) | Method of preparing a filter element absorptive for cs | |
| CN220808827U (en) | Vacuum adsorption type thin film scintillator flashing group fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |