CN107966727A - A kind of neutron composite detecting device - Google Patents

A kind of neutron composite detecting device Download PDF

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Publication number
CN107966727A
CN107966727A CN201711204187.7A CN201711204187A CN107966727A CN 107966727 A CN107966727 A CN 107966727A CN 201711204187 A CN201711204187 A CN 201711204187A CN 107966727 A CN107966727 A CN 107966727A
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Prior art keywords
neutron
detecting device
aluminum hull
lii
plastic scintillant
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CN201711204187.7A
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CN107966727B (en
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张庆威
王婷婷
马刚
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Center Control Systems Engineering (cse) Co Ltd
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Center Control Systems Engineering (cse) Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01TMEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T3/00Measuring neutron radiation
    • G01T3/06Measuring 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 present invention relates to radiometric technique field, specifically disclose a kind of neutron composite detecting device, including aluminum hull, the magnesia bisque on aluminum hull madial wall, the plastic scintillant on the inside of magnesia bisque, on the inside of plastic scintillant6LiI (Eu) scintillators and arranged on aluminum hull, magnesia bisque, plastic scintillant and6Quartz glass above LiI (Eu) scintillator.Apparatus of the present invention can be coupled directly with photomultiplier, plus appropriate electronic circuit, can become can measure fast neutron, the neutron detector of slow neutron can be measured again, and the detector need not increase slow body structure in outside, therefore there is great advantage in volume and weight, facilitate operating personnel to use.

Description

A kind of neutron composite detecting device
Technical field
The invention belongs to radiometric technique field, and in particular to a kind of neutron composite detecting device.
Background technology
With flourishing for China's nuclear industry and core association area, the demand of neutron detection is increasingly increased, main table Now:The reasonability of neutron shield design;Neutron is to the artificial number into dosage;Situation of neutron field distribution etc..Realize Fluence rate, dosage rate, power spectrum of neutron etc. must be measured by stating content.
Neutron detector has the advantage investigative range of oneself at present, i.e., the detection efficient of different neutron detectors depends on In the energy of detected neutron, such as10BF3Proportional counter tube,6Li glass,6LiI(Eu)、3He proportional counter tubes isotonic detects Device be mainly used for measuring slow thermal neutron, plastic scintillant, organic crystal scintillator, liquid scintillator etc. be mainly used for measurement it is fast in Son.If the mixing field of fast neutron and slow neutron, then need to add slow body outside slow neutron detector, to realize to fast Detected while slow neutron, in order to preferably realize to the slowing down of fast neutron, it is necessary to slowing down body thickness is all thicker, and it is thicker Slow body has slow neutron again to be stopped and absorbs, thus this structure to the neutron detection efficiency of whole slow neutron mixing field soon compared with It is low, simultaneously because very thick slow body causes whole detector weight to increased dramatically with volume, make troubles to user.
The content of the invention
It is an object of the invention to provide a kind of neutron composite detecting device, solves traditional slow body and matches somebody with somebody slow neutron detector The problem of detection efficient is relatively low.
Technical scheme is as follows:
A kind of neutron composite detecting device, including aluminum hull, magnesia bisque, plastic scintillant,6LiI (Eu) scintillator, light Couplant, fluid sealant and quartz glass;
The aluminum hull is cylindrical shape, for lucifuge and support;
The magnesia bisque is uniformly arranged on the madial wall of aluminum hull, for reflecting passage of scintillation light;
The plastic scintillant is tubular structure, arranged on the inner side of magnesia bisque;
Described6LiI (Eu) scintillator is solid cylinder, arranged on the inner side of plastic scintillant, and and plastic scintillant Fit closely;
The magnesia bisque, plastic scintillant and6The upper surface of LiI (Eu) scintillator is by coating one layer of optocoupler Mixture is coupled with quartz glass.
In the upper surface of aluminum hull by setting a circle fluid sealant to fix aluminum hull and quartz glass seals.
The aluminum hull, magnesia bisque, plastic scintillant and6LiI (Eu) scintillator is coaxial.
The aluminum hull, magnesia bisque, plastic scintillant and6The upper surface of LiI (Eu) scintillator is coplanar.
The thickness of the aluminum hull is 0.5mm.
The thickness of the magnesia bisque is 1mm.
The plastic scintillant with6LiI (Eu) scintillator is coupled by silicone oil.
The optocoupler mixture is silicone oil.
The neutron composite detecting device is coupled with photoelectric conversion device by silicone oil, subsequently connects electronics circuit.
Lucifuge shell is equipped with outside the photoelectric conversion device.
The neutron detector can measure fast neutron and measure slow neutron.
The remarkable result of the present invention is:
(1) used in apparatus of the present invention6LiI (Eu) scintillator is easy deliquescence, rather than easily deliquescence, therefore common envelope Vanning can be completed6The encapsulation of LiI (Eu) scintillator, more economy.
(2) apparatus of the present invention can be coupled directly with photomultiplier, plus appropriate electronic circuit, you can as both Fast neutron can be measured, and the neutron detector of slow neutron can be measured, and the detector need not increase slow body structure in outside, Therefore there is great advantage in volume and weight, facilitate operating personnel to use.
Brief description of the drawings
Fig. 1 is neutron composite detecting device schematic diagram;
Fig. 2 is neutron composite detecting device application example schematic diagram.
In figure:1- aluminum hulls;2- magnesia bisques;3- plastic scintillants;4-6LiI (Eu) scintillator;5- optocoupler mixture;6- Fluid sealant;7- quartz glass;8- lucifuge shells;9- silicone oil;I-neutron composite detecting device;II-photoelectric conversion device;III-electronics Learn circuit.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the present invention.
A kind of neutron composite detecting device as shown in Figure 1, including aluminum hull 1, magnesia bisque 2, plastic scintillant 3,6LiI (Eu) scintillator 4, optocoupler mixture 5, fluid sealant 6 and quartz glass 7.
The aluminum hull 1 is cylindrical shape, for lucifuge and support, thickness 0.5mm.
The magnesia bisque 2 is uniformly arranged on the madial wall of aluminum hull 1, for reflecting passage of scintillation light, thickness 1mm.
The plastic scintillant 3 is tubular structure, arranged on the inner side of magnesia bisque 2.
Described6LiI (Eu) scintillator 4 is solid cylinder, arranged on the inner side of plastic scintillant 3, and and Plastic scintillation Body 3 fits closely, and can be coupled both by silicone oil according to actual conditions.
The aluminum hull 1, magnesia bisque 2,3 and of plastic scintillant6LiI (Eu) scintillator 4 is coaxial, and aluminum hull 1, oxidation Magnesium powder layer 2,3 and of plastic scintillant6The upper surface of LiI (Eu) scintillator 4 is coplanar.
In the magnesia bisque 2,3 and of plastic scintillant6The upper surface of LiI (Eu) scintillator 4 is by coating one layer Optocoupler mixture 5 is coupled with quartz glass 7, the optocoupler mixture 5 selection silicone oil.In the upper surface of aluminum hull 1 by setting a circle Aluminum hull 1 and quartz glass 7 are sealed fixation by fluid sealant 6.
As shown in Fig. 2, neutron composite detecting device I of the present invention is directly coupled with photoelectric conversion device II, follow-up connection Appropriate electronics circuit III, you can as that can measure fast neutron and measure the neutron detector of slow neutron.Described One layer of silicone oil 9 is coated between neutron composite detecting device I and photoelectric conversion device II, is equipped with and keeps away outside photoelectric conversion device II Bare hull 8.
Neutron produces passage of scintillation light with the interaction of neutron composite detecting device I, and a part of passage of scintillation light is collected into photoelectricity and turns In changing device II, be converted into electric signal, follow-up electronics circuit III is amplified the electric signal, shaping, examination, in obtaining Subsignal.The example may be directly applied in general neutron fluence rate instrument, Neutron Survey meter, as main probe segment.
Since neutron composite detecting device I has response to fast neutron and slow neutron, which can be used for The neutron for mixing neutron field is measured.
The application example need not increase slow body structure outside detector, you can realize the measurement to fast neutron, because This has great advantage in volume and weight.
The photoelectric conversion part used in this application example is photomultiplier, followed by divider provides for photomultiplier Operating voltage.

Claims (10)

  1. A kind of 1. neutron composite detecting device, it is characterised in that:Including aluminum hull (1), magnesia bisque (2), plastic scintillant (3)、6LiI (Eu) scintillator (4), optocoupler mixture (5), fluid sealant (6) and quartz glass (7);
    The aluminum hull (1) is cylindrical shape, for lucifuge and support;
    The magnesia bisque (2) is uniformly arranged on the madial wall of aluminum hull (1), for reflecting passage of scintillation light;
    The plastic scintillant (3) is tubular structure, arranged on the inner side of magnesia bisque (2);
    Described6LiI (Eu) scintillator (4) is solid cylinder, arranged on the inner side of plastic scintillant (3), and and plastic scintillant (3) fit closely;
    The magnesia bisque (2), plastic scintillant (3) and6The upper surface of LiI (Eu) scintillator (4) is by coating one layer Optocoupler mixture (5) is coupled with quartz glass (7).
    In the upper surface of aluminum hull (1) by setting a circle fluid sealant (6) to fix aluminum hull (1) and quartz glass (7) sealing.
  2. A kind of 2. neutron composite detecting device as claimed in claim 1, it is characterised in that:The aluminum hull (1), magnesia powder Layer (2), plastic scintillant (3) and6LiI (Eu) scintillator (4) is coaxial.
  3. A kind of 3. neutron composite detecting device as claimed in claim 2, it is characterised in that:The aluminum hull (1), magnesia powder Layer (2), plastic scintillant (3) and6The upper surface of LiI (Eu) scintillator (4) is coplanar.
  4. A kind of 4. neutron composite detecting device as claimed in claim 3, it is characterised in that:The thickness of the aluminum hull (1) is 0.5mm。
  5. A kind of 5. neutron composite detecting device as claimed in claim 4, it is characterised in that:The magnesia bisque (2) Thickness is 1mm.
  6. A kind of 6. neutron composite detecting device as claimed in claim 5, it is characterised in that:The plastic scintillant (3) with6LiI (Eu) scintillator (4) is coupled by silicone oil.
  7. A kind of 7. neutron composite detecting device as claimed in claim 6, it is characterised in that:The optocoupler mixture (5) is silicon Oil.
  8. A kind of 8. neutron detector based on neutron composite detecting device described in claim 7, it is characterised in that:The neutron Composite detecting device is coupled with photoelectric conversion device by silicone oil, subsequently connects electronics circuit.
  9. A kind of 9. neutron detector as claimed in claim 8, it is characterised in that:It is equipped with outside the photoelectric conversion device Lucifuge shell.
  10. A kind of 10. neutron detector as claimed in claim 9, it is characterised in that:The neutron detector can measure soon Neutron, and slow neutron can be measured.
CN201711204187.7A 2017-11-27 2017-11-27 Neutron composite detection device Active CN107966727B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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
CN112908498A (en) * 2021-03-30 2021-06-04 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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Cited By (4)

* Cited by examiner, † Cited by third party
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
CN112908498A (en) * 2021-03-30 2021-06-04 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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