CN107966727B - Neutron composite detection device - Google Patents
Neutron composite detection device Download PDFInfo
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- CN107966727B CN107966727B CN201711204187.7A CN201711204187A CN107966727B CN 107966727 B CN107966727 B CN 107966727B CN 201711204187 A CN201711204187 A CN 201711204187A CN 107966727 B CN107966727 B CN 107966727B
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- scintillator
- neutron
- detection device
- composite detection
- aluminum shell
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000004033 plastic Substances 0.000 claims abstract description 28
- 229920003023 plastic Polymers 0.000 claims abstract description 28
- 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
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 9
- 229920002545 silicone oil Polymers 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 241001544487 Macromiidae Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/06—Measuring neutron radiation with scintillation detectors
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention relates to the technical field of radiation measurement, and particularly discloses a neutron composite detection device which comprises an aluminum shell, a magnesia powder layer arranged on the inner side wall of the aluminum shell, a plastic scintillator arranged on the inner side of the magnesia powder layer, a 6 LiI (Eu) scintillator arranged on the inner side of the plastic scintillator, and quartz glass arranged above the aluminum shell, the magnesia powder layer, the plastic scintillator and the 6 LiI (Eu) scintillator. The device can be directly coupled with the photomultiplier and is added with a proper electronic circuit to form the neutron detector capable of measuring fast neutrons and slow neutrons, and the detector does not need to be externally provided with a moderating body structure, so that the device has great advantages in terms of volume and weight and is convenient for operators to use.
Description
Technical Field
The invention belongs to the technical field of radiation measurement, and particularly relates to a neutron composite detection device.
Background
With the vigorous development of the nuclear industry and the nuclear related fields in China, the demand for detecting the protons is increasing, and the main expression is as follows: rationality of neutron shielding design; how much neutron pair is artificial in dosage; status of neutron field distribution, etc. The fluence rate, dose rate, neutron spectrum, etc. must be measured to achieve this.
The existing neutron detectors have their own advantageous detection range, that is, the detection efficiency of different neutron detectors depends on the energy of the detected neutrons, for example, the neutron detectors such as 10BF3 proportional counter tubes, 6 Li glass, 6LiI(Eu)、3 He proportional counter tubes and the like are mainly used for measuring slow thermal neutrons, and plastic scintillators, organic crystal scintillators, liquid scintillators and the like are mainly used for measuring fast neutrons. If the slow neutron is a mixed field of fast neutrons and slow neutrons, a slowing body needs to be added outside the slow neutron detector to realize simultaneous detection of the fast neutrons, the thickness of the slowing body needs to be thicker for better realizing the slowing of the fast neutrons, and the thicker slowing body is used for blocking and absorbing the slow neutrons, so that the neutron detection efficiency of the whole fast and slow neutron mixed field is lower due to the structure, and meanwhile, the weight and the volume of the whole detector are rapidly increased due to the thicker slowing body, so that inconvenience is brought to a user.
Disclosure of Invention
The invention aims to provide a neutron composite detection device, which solves the problem of lower detection efficiency of a traditional slow neutron detector matched with a slow body.
The technical scheme of the invention is as follows:
a neutron composite detection device comprises an aluminum shell, a magnesia powder layer, a plastic scintillator, 6 LiI (Eu) scintillators, an optical coupling agent, sealant and quartz glass;
The aluminum shell is cylindrical and is used for shielding light and supporting;
The magnesia powder layer is uniformly arranged on the inner side wall of the aluminum shell and is used for reflecting the scintillation light;
the plastic scintillator is of a cylindrical structure and is arranged on the inner side of the magnesium oxide powder layer;
The 6 LiI (Eu) scintillator is a solid cylinder, is arranged on the inner side of the plastic scintillator and is tightly attached to the plastic scintillator;
And the upper surfaces of the magnesia powder layer, the plastic scintillator and the 6 LiI (Eu) scintillator are coupled with quartz glass by coating a layer of optical coupling agent.
And a circle of sealant is arranged on the upper surface of the aluminum shell to seal and fix the aluminum shell and the quartz glass.
The aluminum shell, the magnesia powder layer, the plastic scintillator and the 6 LiI (Eu) scintillator are coaxial.
The upper surfaces of the aluminum shell, the magnesia powder layer, the plastic scintillator and the 6 LiI (Eu) scintillator are coplanar.
The thickness of the aluminum shell is 0.5mm.
The thickness of the magnesium oxide powder layer is 1mm.
The plastic scintillator is coupled with 6 LiI (Eu) scintillator through silicone oil.
The optical coupling agent is silicone oil.
The neutron composite detection device and the photoelectric conversion device are coupled through silicone oil, and then are connected with an electronic circuit.
And a light-shielding shell is arranged outside the photoelectric conversion device.
The neutron detector can measure fast neutrons and slow neutrons.
The invention has the remarkable effects that:
(1) The 6 LiI (Eu) scintillator adopted in the device is deliquescent, but not very deliquescent, so that the common packaging box can complete the packaging of the 6 LiI (Eu) scintillator, and the device has higher economical efficiency.
(2) The device can be directly coupled with the photomultiplier and is added with a proper electronic circuit to form the neutron detector capable of measuring fast neutrons and slow neutrons, and the detector does not need to be externally provided with a moderating body structure, so that the device has great advantages in terms of volume and weight and is convenient for operators to use.
Drawings
FIG. 1 is a schematic diagram of a neutron composite detection device;
FIG. 2 is a schematic diagram of an example application of a neutron composite detection device.
In the figure: 1-an aluminum shell; 2-magnesia powder layer; 3-plastic scintillators; 4- 6 LiI (Eu) scintillators; 5-an optical couplant; 6, sealing glue; 7-quartz glass; 8-a light-shielding shell; 9-silicone oil; i-neutron composite detection device; II-a photoelectric conversion device; III-electronics.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The neutron composite detection device shown in fig. 1 comprises an aluminum shell 1, a magnesia powder layer 2, a plastic scintillator 3, 6 LiI (Eu) scintillators 4, a light coupling agent 5, a sealant 6 and quartz glass 7.
The aluminum shell 1 is cylindrical and is used for light shielding and supporting, and the thickness is 0.5mm.
The magnesia powder layer 2 is uniformly arranged on the inner side wall of the aluminum shell 1 and used for reflecting the scintillation light, and the thickness is 1mm.
The plastic scintillator 3 is in a cylindrical structure and is arranged on the inner side of the magnesium oxide powder layer 2.
6 LiI (Eu) scintillator 4 be solid cylinder, locate the inboard of plastics scintillator 3, and closely laminate with plastics scintillator 3, can couple both through silicone oil according to actual conditions.
The aluminum shell 1, the magnesium oxide powder layer 2, the plastic scintillators 3 and 6 LiI (Eu) scintillators 4 are coaxial, and the upper surfaces of the aluminum shell 1, the magnesium oxide powder layer 2, the plastic scintillators 3 and 6 LiI (Eu) scintillators 4 are coplanar.
The upper surfaces of the magnesia powder layer 2, the plastic scintillator 3 and the 6 LiI (Eu) scintillator 4 are coupled with quartz glass 7 by coating a layer of optical couplant 5, and the optical couplant 5 is silicon oil. The upper surface of the aluminum shell 1 is provided with a circle of sealant 6 to seal and fix the aluminum shell 1 and quartz glass 7.
As shown in FIG. 2, the neutron composite detection device I is directly coupled with a photoelectric conversion device II, and then is connected with a proper electronic circuit III, so that the neutron detector can be used for measuring fast neutrons and slow neutrons. A layer of silicone oil 9 is coated between the neutron composite detection device I and the photoelectric conversion device II, and a light-shielding shell 8 is arranged outside the photoelectric conversion device II.
The neutron interacts with the neutron composite detection device I to generate scintillation light, a part of the scintillation light is collected into the photoelectric conversion device II and converted into an electric signal, and the electric signal is amplified, shaped and screened by the subsequent electronic circuit III to obtain a neutron signal. This example can be directly applied to a general neutron fluence rate instrument and a neutron cruiser as a main probe part.
Because the neutron composite detection device I responds to fast neutrons and slow neutrons, the application example can be used for measuring neutrons in a mixed neutron field.
The application example can realize the measurement of fast neutrons without adding a moderating body structure outside the detector, so that the fast neutrons have great advantages in terms of volume and weight.
The photo-conversion component employed in this application example is a photomultiplier tube, followed by a voltage divider to provide the photomultiplier tube with an operating voltage.
Claims (10)
1. A neutron composite detection device, characterized in that: comprises an aluminum shell (1), a magnesia powder layer (2), a plastic scintillator (3), a 6 LiI (Eu) scintillator (4), an optical coupling agent (5), a sealant (6) and quartz glass (7);
the aluminum shell (1) is cylindrical and is used for shading and supporting;
The magnesia powder layer (2) is uniformly arranged on the inner side wall of the aluminum shell (1) and is used for reflecting the scintillation light;
The plastic scintillator (3) is of a cylindrical structure and is arranged on the inner side of the magnesium oxide powder layer (2);
The 6 LiI (Eu) scintillator (4) is a solid cylinder, is arranged on the inner side of the plastic scintillator (3), and is tightly attached to the plastic scintillator (3);
The upper surfaces of the magnesia powder layer (2), the plastic scintillator (3) and the 6 LiI (Eu) scintillator (4) are coupled with quartz glass (7) by coating a layer of optical coupling agent (5);
The upper surface of the aluminum shell (1) is provided with a circle of sealant (6) to seal and fix the aluminum shell (1) and the quartz glass (7).
2. The neutron composite detection device of claim 1, wherein: the aluminum shell (1), the magnesia powder layer (2), the plastic scintillator (3) and the 6 LiI (Eu) scintillator (4) are coaxial.
3. The neutron composite detection device of claim 2, wherein: the upper surfaces of the aluminum shell (1), the magnesia powder layer (2), the plastic scintillator (3) and the 6 LiI (Eu) scintillator (4) are coplanar.
4. A neutron composite detection device according to claim 3, wherein: the thickness of the aluminum shell (1) is 0.5mm.
5. The neutron composite detection device of claim 4, wherein: the thickness of the magnesia powder layer (2) is 1mm.
6. The neutron composite detection device of claim 5, wherein: the plastic scintillator (3) and the 6 LiI (Eu) scintillator (4) are coupled through silicone oil.
7. The neutron composite detection device of claim 6, wherein: the optical coupling agent (5) is silicone oil.
8. The neutron composite detection device of claim 7, wherein: the neutron composite detection device and the photoelectric conversion device are coupled through silicone oil and then connected with an electronic circuit to form the neutron detector.
9. The neutron composite detection device of claim 8, wherein: and a light-shielding shell is arranged outside the photoelectric conversion device.
10. The neutron composite detection device of claim 9, wherein: the neutron detector can measure fast neutrons and slow neutrons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204187.7A CN107966727B (en) | 2017-11-27 | 2017-11-27 | Neutron composite detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204187.7A CN107966727B (en) | 2017-11-27 | 2017-11-27 | Neutron composite detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107966727A CN107966727A (en) | 2018-04-27 |
| CN107966727B true CN107966727B (en) | 2024-06-11 |
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| CN201711204187.7A Active CN107966727B (en) | 2017-11-27 | 2017-11-27 | Neutron composite detection device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613602A (en) * | 2018-12-25 | 2019-04-12 | 中国辐射防护研究院 | A kind of method of indium-doped glass measurement neutron |
| CN111025376A (en) * | 2019-12-26 | 2020-04-17 | 中广核久源（成都）科技有限公司 | Detector for measuring fast neutron and fast response and high detection efficiency |
| CN112908498B (en) * | 2021-03-30 | 2022-03-29 | 陕西卫峰核电子有限公司 | Irradiation-resistant slowing shielding device and assembling method thereof |
| CN114994743A (en) * | 2022-06-14 | 2022-09-02 | 西北核技术研究所 | Fast neutron time spectrum detection method and device |
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| JPH09304304A (en) * | 1996-05-17 | 1997-11-28 | General Sekiyu Kk | Void fraction measuring device |
| RU2189057C2 (en) * | 2000-11-13 | 2002-09-10 | Уральский государственный технический университет | Scintillation detector of neutron and gamma radiation |
| RU2259573C1 (en) * | 2004-03-23 | 2005-08-27 | ГОУ ВПО Уральский государственный технический университет-УПИ | Scintillation detector for fast and thermal neutrons |
| RU2272301C1 (en) * | 2004-11-16 | 2006-03-20 | ГОУ ВПО Уральский государственный технический университет-УПИ | Scintillating neutron detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7141799B1 (en) * | 2005-03-30 | 2006-11-28 | Ut-Battelle, Llc | Fiber optic thermal/fast neutron and gamma ray scintillation detector |
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2017
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