CN113970780A - Novel plastic scintillator for nuclear detection - Google Patents
Novel plastic scintillator for nuclear detection Download PDFInfo
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- CN113970780A CN113970780A CN202010718086.7A CN202010718086A CN113970780A CN 113970780 A CN113970780 A CN 113970780A CN 202010718086 A CN202010718086 A CN 202010718086A CN 113970780 A CN113970780 A CN 113970780A
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- scintillator
- base material
- wave
- substrate
- shifting agent
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/203—Measuring radiation intensity with scintillation detectors the detector being made of plastics
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a novel plastic scintillator for nuclear detection, which is characterized in that: comprises a base material, a first scintillator and a wave-shifting agent, wherein the base material is p-dimethyl styrene and m-dimethyl styrene; the first scintillator is 2, 5-diphenyloxazole; the wave-shifting agent is 1, 4-bis (5-phenyl-2-oxa) benzene; the weight fractions of the base material, the first scintillator and the wave-shifting agent are respectively 96 wt% -98 wt%, 2 wt% -1.4 wt% and 0.1 wt% -0.06 wt%. The invention adopts the p-and m-dimethyl styrene as the base material, and adjusts the proportion of the first scintillator and the wave shifting agent, so that the signal forming time is fast, the control and measurement efficiency is high, and the invention is more suitable for the measurement of various alpha, beta, gamma electrons and neutrons.
Description
Technical Field
The invention relates to the field of plastic scintillators, in particular to a novel plastic scintillator for nuclear detection.
Background
Plastic scintillators are solid solutions of organic scintillating substances in plastic, typically consisting of a matrix scintillating substance and a wave-shifting agent. It belongs to an organic scintillator, but not an organic crystal scintillator. It can be used for detecting alpha, beta, gamma, fast neutron, proton, cosmic ray and fission fragment, etc. It is easy to make into very large transparent body, and is easy to be processed into various shapes, and has the advantages of no deliquescence, stable performance, radiation resistance, short scintillation decay time and low cost, etc., so that it is a scintillator which is extensively used at present.
Disclosure of Invention
In view of the above-mentioned drawbacks or deficiencies in the prior art, it is desirable to provide a novel plastic scintillator for nuclear detection.
According to the technical scheme provided by the embodiment of the application, the novel plastic scintillator for nuclear detection comprises a base material, a first scintillator and a wave-shifting agent, wherein the base material is p-methylstyrene or m-methylstyrene; the first scintillator is 2, 5-diphenyloxazole; the wave-shifting agent is 1, 4-bis (5-phenyl-2-oxa) benzene; the weight fractions of the base material, the first scintillator and the wave-shifting agent are respectively 96 wt% -98 wt%, 2 wt% -1.4 wt% and 0.1 wt% -0.06 wt%.
In the invention, the preparation steps of the plastic scintillator are as follows:
(1) dehydrating the base material: dehydrating the substrate p-dimethyl styrene and m-dimethyl styrene by a vacuum low-temperature dehydration device;
(2) and (3) purifying the base material: distilling the substrate fraction by adopting a reduced pressure distillation method, and removing the polymerization inhibitor to further purify the substrate;
(3) uniformly mixing the first scintillator and the wave-shifting agent at normal temperature, mutually dissolving and uniformly mixing the purified base material, the uniformly mixed first scintillator and the wave-shifting agent, and preparing the solid plastic scintillator by adopting a pre-polymerization method, an opposite-end pressurization method, an end sealing method, a stage-degree temperature rise method, an end unsealing method and a vacuum secondary curing method;
(4) coating and spraying the prepared scintillator, and processing the scintillator into a product;
(5) and (5) product detection, namely performing performance test on the product by adopting a contrast test.
In the present invention, the conditions for dehydrating the base material are: the vacuum degree is-0.1 MPa-0.2 MPa, and the temperature is 0 ℃ to 10 ℃.
In the invention, the conditions of the substrate purification and reduced pressure distillation are as follows: the vacuum degree is-0.02 MPa-0.03 MPa, and the temperature is 40 ℃.
To sum up, the beneficial effect of this application: the invention adopts the p-and m-dimethyl styrene as the base material, and adjusts the proportion of the first scintillator and the wave shifting agent, so that the signal forming time is fast, the control and measurement efficiency is high, and the invention is more suitable for the measurement of various alpha, beta, gamma electrons and neutrons.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the embodiments.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to examples.
A novel plastic scintillator for nuclear detection comprises a base material, a first scintillator and a wave-shifting agent, wherein the base material is p-dimethyl styrene and m-dimethyl styrene; the first scintillator is 2, 5-diphenyloxazole; the wave-shifting agent is 1, 4-bis (5-phenyl-2-oxa) benzene; the weight fractions of the base material, the first scintillator and the wave-shifting agent are respectively 96 wt% -98 wt%, 2 wt% -1.4 wt% and 0.1 wt% -0.06 wt%.
The preparation steps of the plastic scintillator are as follows:
(1) dehydrating the base material: dehydrating the substrate p-dimethyl styrene and m-dimethyl styrene by a vacuum low-temperature dehydration device;
(2) and (3) purifying the base material: distilling the substrate fraction by adopting a reduced pressure distillation method, and removing the polymerization inhibitor to further purify the substrate;
(3) uniformly mixing the first scintillator and the wave-shifting agent at normal temperature, mutually dissolving and uniformly mixing the purified base material, the uniformly mixed first scintillator and the wave-shifting agent, and preparing the solid plastic scintillator by adopting a pre-polymerization method, an opposite-end pressurization method, an end sealing method, a stage-degree temperature rise method, an end unsealing method and a vacuum secondary curing method;
(4) coating and spraying the prepared scintillator, and processing the scintillator into a product;
(5) and (5) product detection, namely performing performance test on the product by adopting a contrast test.
The conditions for dehydration of the substrate were: the vacuum degree is-0.1 MPa-0.2 MPa, and the temperature is 0 ℃ to 10 ℃. The conditions of the substrate purification and the reduced pressure distillation are as follows: the vacuum degree is-0.02 MPa-0.03 MPa, and the temperature is 40 ℃.
Note: the plastic scintillator adopts the methods of prepolymerization, end sealing by pressure at different ends, end sealing by temperature rise at different stages, end unsealing and vacuum secondary curing, and is the same as the curing and manufacturing method of the polystyrene plastic scintillator.
When the performance of the plastic scintillator is tested, the performance of the plastic scintillator can be tested by adopting an electromagnetic particle detector to carry out a contrast test on the plastic scintillator.
The foregoing description is only exemplary of the preferred embodiments of the application and is provided for the purpose of illustrating the general principles of the technology and the like. Meanwhile, the scope of the invention according to the present application is not limited to the technical solutions in which the above-described technical features are combined in a specific manner, and also covers other technical solutions in which the above-described technical features or their equivalent are combined arbitrarily without departing from the inventive concept described above. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (4)
1. A novel plastic scintillator for nuclear detection is characterized in that: comprises a substrate, a first scintillator and a wave-shifting agent,
the base material is p-dimethyl styrene and m-dimethyl styrene; the first scintillator is 2, 5-diphenyloxazole; the wave-shifting agent is 1, 4-bis (5-phenyl-2-oxa) benzene;
the weight fractions of the base material, the first scintillator and the wave-shifting agent are respectively 96 wt% -98 wt%, 2 wt% -1.4 wt% and 0.1 wt% -0.06 wt%.
2. The novel plastic scintillator for nuclear detection as claimed in claim 1, wherein: the preparation steps are as follows:
(1) dehydrating the base material: dehydrating the substrate p-dimethyl styrene and m-dimethyl styrene by a vacuum low-temperature dehydration device;
(2) and (3) purifying the base material: distilling the substrate fraction by adopting a reduced pressure distillation method, and removing the polymerization inhibitor to further purify the substrate;
(3) uniformly mixing the first scintillator and the wave-shifting agent at normal temperature, mutually dissolving and uniformly mixing the purified base material, the uniformly mixed first scintillator and the wave-shifting agent, and preparing the solid plastic scintillator by adopting a pre-polymerization method, an opposite-end pressurization method, an end sealing method, a stage-degree temperature rise method, an end unsealing method and a vacuum secondary curing method;
(4) coating and spraying the prepared scintillator, and processing the scintillator into a product;
(5) and (5) product detection, namely performing performance test on the product by adopting a contrast test.
3. The novel plastic scintillator for nuclear detection as claimed in claim 2, wherein: the conditions for dehydration of the substrate were: the vacuum degree is-0.1 MPa-0.2 MPa, and the temperature is 0 ℃ to 10 ℃.
4. The novel plastic scintillator for nuclear detection as claimed in claim 2, wherein: the conditions of the substrate purification and the reduced pressure distillation are as follows: the vacuum degree is-0.02 MPa-0.03 MPa, and the temperature is 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718086.7A CN113970780A (en) | 2020-07-23 | 2020-07-23 | Novel plastic scintillator for nuclear detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718086.7A CN113970780A (en) | 2020-07-23 | 2020-07-23 | Novel plastic scintillator for nuclear detection |
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| CN113970780A true CN113970780A (en) | 2022-01-25 |
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| CN202010718086.7A Pending CN113970780A (en) | 2020-07-23 | 2020-07-23 | Novel plastic scintillator for nuclear detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685704A (en) * | 2022-03-16 | 2022-07-01 | 中国辐射防护研究院 | Plastic scintillation microsphere and synthetic method thereof |
| CN114721030A (en) * | 2022-05-05 | 2022-07-08 | 四川大学 | Preparation method of wave-shifting optical fiber |
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| US20140332689A1 (en) * | 2013-04-12 | 2014-11-13 | Radiation Monitoring Devices, Inc. | Plastic scintillators |
| CN106324659A (en) * | 2015-06-30 | 2017-01-11 | 中国辐射防护研究院 | Neutron-sensitive substance boron-doped plastic scintillator and thermal neutron measurement method thereof |
| CN107903347A (en) * | 2017-11-28 | 2018-04-13 | 西南科技大学 | A kind of plastic scintillant and its no initiator preparation method |
| CN111088038A (en) * | 2019-12-16 | 2020-05-01 | 同济大学 | Lithium phosphate-loaded nanocrystalline liquid scintillator and preparation method thereof |
| CN111338178A (en) * | 2020-02-19 | 2020-06-26 | 深圳市安健科技股份有限公司 | Three-dimensional scintillator fiber array X-ray detector and preparation method thereof |
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2020
- 2020-07-23 CN CN202010718086.7A patent/CN113970780A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| US20140332689A1 (en) * | 2013-04-12 | 2014-11-13 | Radiation Monitoring Devices, Inc. | Plastic scintillators |
| CN106324659A (en) * | 2015-06-30 | 2017-01-11 | 中国辐射防护研究院 | Neutron-sensitive substance boron-doped plastic scintillator and thermal neutron measurement method thereof |
| CN107903347A (en) * | 2017-11-28 | 2018-04-13 | 西南科技大学 | A kind of plastic scintillant and its no initiator preparation method |
| CN111088038A (en) * | 2019-12-16 | 2020-05-01 | 同济大学 | Lithium phosphate-loaded nanocrystalline liquid scintillator and preparation method thereof |
| CN111338178A (en) * | 2020-02-19 | 2020-06-26 | 深圳市安健科技股份有限公司 | Three-dimensional scintillator fiber array X-ray detector and preparation method thereof |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685704A (en) * | 2022-03-16 | 2022-07-01 | 中国辐射防护研究院 | Plastic scintillation microsphere and synthetic method thereof |
| CN114721030A (en) * | 2022-05-05 | 2022-07-08 | 四川大学 | Preparation method of wave-shifting optical fiber |
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