JP5737978B2 - 中性子検出用シンチレーター及び中性子線検出器 - Google Patents
中性子検出用シンチレーター及び中性子線検出器 Download PDFInfo
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- JP5737978B2 JP5737978B2 JP2011022190A JP2011022190A JP5737978B2 JP 5737978 B2 JP5737978 B2 JP 5737978B2 JP 2011022190 A JP2011022190 A JP 2011022190A JP 2011022190 A JP2011022190 A JP 2011022190A JP 5737978 B2 JP5737978 B2 JP 5737978B2
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- 229910052710 silicon Inorganic materials 0.000 claims description 29
- 239000010703 silicon Substances 0.000 claims description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 26
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
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- BHHYHSUAOQUXJK-UHFFFAOYSA-L zinc fluoride Chemical compound F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 description 2
- 229910016569 AlF 3 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
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- 229910052786 argon Inorganic materials 0.000 description 1
- UHTINMXRTRWAHG-UHFFFAOYSA-N argon;tetrafluoromethane Chemical compound [Ar].FC(F)(F)F UHTINMXRTRWAHG-UHFFFAOYSA-N 0.000 description 1
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- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Inorganic materials [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 1
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Images
Classifications
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- 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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7704—Halogenides
- C09K11/7705—Halogenides with alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7732—Halogenides
- C09K11/7733—Halogenides with alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/08—Downward pulling
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/12—Halides
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0232—Optical elements or arrangements associated with the device
- H01L31/02322—Optical elements or arrangements associated with the device comprising luminescent members, e.g. fluorescent sheets upon the device
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
- Luminescent Compositions (AREA)
- Light Receiving Elements (AREA)
Description
M X M Y M Z F 6
(M X はLiを必ず含む、Li、Na、K、Rb、Cs、から選ばれる少なくとも一種類の元素、M Y は、Ca、Mg、Ba、Sr、Cd、Be、から選ばれる少なくとも一種類の元素、M Z は、Al、Ga、In、から選ばれる少なくとも一種類の元素を表す)、
及び該中性子検出用シンチレーター及び光検出器を備えることを特徴とする中性子線検出器である。
式中、Wi及びZiは、それぞれシンチレーターを構成する元素のうちのi番目の元素の質量分率及び原子番号である。
(式中、ρは希土類元素を含有させたコルキライト型フッ化物単結晶の密度[g/cm3]、Mは分子量[g/mol]、CはLi元素中の6Li含有率[%]、Aはアボガドロ数[6.02×1023]を示す)
本発明の中性子検出用シンチレーターは単結晶からなっているので、格子欠陥に起因する非輻射遷移や結晶粒界でのシンチレーション光の散逸などによるロスを生じることがなく、発光強度が高い。
(中性子検出用シンチレーターの製造)
以下、実施例1についてコルキライト型フッ化物単結晶の製造方法を説明するが、表1に示すように、添加する元素の種類及び原料秤量値が異なることを除いて実施例2〜8についても同様の方法で作製した。
実施例1、5の中性子検出用シンチレーターのα線励起発光を下記の方法によって検出した。
(シリコンフォトダイオードを備えた中性子線検出器の作製)
実施例6の本発明の中性子用シンチレーターを、図5に示す模式図のように、シリコンフォトダイオード13と組み合わせることによって、中性子検出器とした。
(光電子増倍管を備えた中性子線検出器の作製)
図7に本発明の中性子線検出器の構成を示す。光電子増倍管16には約250nm〜750nmの光に感度を有する浜松ホトニクス社製R7600Uを用い、中性子検出用シンチレーター9として実施例1〜8の中性子検出用シンチレーターの長さ7mm、幅2mmの面を光電子増倍管16の光電面に対して光学グリースで接着した後、外部からの光が入らないように黒色のビニールシートからなる遮光材14で遮光した。
以上により、本発明の中性子検出用シンチレーターと光電子増倍管を組み合わせることで、中性子線検出器として動作することがわかる。
2 ヒーター
3 断熱材
4 ステージ
5 坩堝
6 チャンバー
7 高周波コイル
8 引き下げロッド
9 中性子検出用シンチレーター
10 241Am密封線源
11 シンチレーション光
12 CCD分光器
13 フォトダイオード
14 遮光材
15 電流計
16 光電子増倍管
Claims (4)
- 希土類元素から選ばれる少なくとも二種類の元素を含有し、6Liを0.80atom/nm3以上含有する、下記式で表されるコルキライト型フッ化物単結晶からなる中性子検出用シンチレーター。
M X M Y M Z F 6
(M X はLiを必ず含む、Li、Na、K、Rb、Cs、から選ばれる少なくとも一種類の元素、M Y は、Ca、Mg、Ba、Sr、Cd、Be、から選ばれる少なくとも一種類の元素、M Z は、Al、Ga、In、から選ばれる少なくとも一種類の元素を表す) - Ce又はEuのいずれか一方を含有する請求項1記載の中性子検出用シンチレーター。
- 請求項1記載の中性子検出用シンチレーター及び光検出器を備えることを特徴とする中性子線検出器。
- 光検出器がシリコンフォトダイオードである請求項3記載の中性子検出器。
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JP2011022190A JP5737978B2 (ja) | 2011-02-03 | 2011-02-03 | 中性子検出用シンチレーター及び中性子線検出器 |
PCT/JP2012/052527 WO2012105695A1 (ja) | 2011-02-03 | 2012-02-03 | 中性子線検出用シンチレーター及び中性子線検出装置 |
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JP2011022190A JP5737978B2 (ja) | 2011-02-03 | 2011-02-03 | 中性子検出用シンチレーター及び中性子線検出器 |
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JP5460067B2 (ja) * | 2009-02-09 | 2014-04-02 | 株式会社トクヤマ | 放射線検出装置 |
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JP2012162602A (ja) | 2012-08-30 |
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