JP2007047066A - 中性子・γ線非弁別式臨界検出装置 - Google Patents
中性子・γ線非弁別式臨界検出装置 Download PDFInfo
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Abstract
【解決手段】 入射するγ線を検出するγ線検出器10と、該γ線検出器を覆うように配置されて外部から入射する中性子を減速し熱中性子に変換する中性子減速材12と、該中性子減速材と前記γ線検出器との境界に該γ線検出器全体を取り囲むように介装した熱中性子−捕獲γ線変換材14を具備し、前記γ線検出器からの検出出力を電流変換部(光電子増倍管18)で電流に変換し、変換した電流を電流計測部(電流計20)で計測するようにして電流モードで動作させる。
【選択図】 図1
Description
12 中性子減速材
14 第1の熱中性子−捕獲γ線変換材
16 第2の熱中性子−捕獲γ線変換材
18 光電子増倍管
20 電流計
Claims (3)
- 入射するγ線を検出するγ線検出器と、該γ線検出器を覆うように配置されて外部から入射する中性子を減速して熱中性子に変換する中性子減速材と、該中性子減速材と前記γ線検出器との境界に該γ線検出器全体を取り囲むように介装した熱中性子−捕獲γ線変換材を具備し、前記γ線検出器からの検出出力を電流変換部で電流に変換し、変換された電流を電流計測部で計測するようにして電流モードで動作させることを特徴とする中性子・γ線非弁別式臨界検出装置。
- 中性子減速材内の中間位置にγ線検出器を取り囲むように配置した第2の熱中性子−捕獲γ線変換材を具備し、中性子減速材及び熱中性子−捕獲γ線変換材がともに複層構造となり、中性子に対する感度がγ線に対する感度と同程度に揃えられている請求項1記載の中性子・γ線非弁別式臨界検出装置。
- γ線検出器が円柱形プラスチックシンチレータ、電流変換部が光電子増倍管であり、中性子減速材がポリエチレン、熱中性子−捕獲γ線変換材がカドミウムからなる請求項1又は2記載の中性子・γ線非弁別式臨界検出装置。
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2463550A (en) * | 2008-08-22 | 2010-03-24 | Nucsafe Inc | Detection of Fissile Material |
JP2012052889A (ja) * | 2010-08-31 | 2012-03-15 | Toshiba Corp | 中性子測定装置 |
JP2013500480A (ja) * | 2009-07-27 | 2013-01-07 | フリール・ラディエーション・ゲーエムベーハー | 捕獲ガンマ線熱量測定による中性子検出用の装置及び方法 |
CN103176203A (zh) * | 2011-12-22 | 2013-06-26 | 同方威视技术股份有限公司 | 一种探测器以及使用该探测器同时探测伽马射线和中子射线的方法 |
JP2019536065A (ja) * | 2016-11-15 | 2019-12-12 | サーモ フィッシャー サイエンティフィック メステクニック ゲゼルシャフト ミット ベシュレンクテル ハフツング | 中性子線検出システム及び方法 |
JP2020071120A (ja) * | 2018-10-31 | 2020-05-07 | 三菱電機株式会社 | 放射線検出器 |
CN112434403A (zh) * | 2020-10-29 | 2021-03-02 | 中国核电工程有限公司 | 一种核临界事故报警***的布置优化及阈值选取方法 |
CN113504559A (zh) * | 2021-07-05 | 2021-10-15 | 中国科学院近代物理研究所 | 一种强流脉冲宽能谱中子剂量率监测装置 |
US11506801B2 (en) | 2018-10-10 | 2022-11-22 | Ebamed Sa | Prompt gamma monitor for hadron therapy |
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2005
- 2005-08-11 JP JP2005233100A patent/JP4189505B2/ja not_active Expired - Fee Related
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2463550A (en) * | 2008-08-22 | 2010-03-24 | Nucsafe Inc | Detection of Fissile Material |
GB2463550B (en) * | 2008-08-22 | 2011-11-09 | Nucsafe Inc | Apparatus and method for detection of fissile material using active interrogation |
JP2013500480A (ja) * | 2009-07-27 | 2013-01-07 | フリール・ラディエーション・ゲーエムベーハー | 捕獲ガンマ線熱量測定による中性子検出用の装置及び方法 |
JP2012052889A (ja) * | 2010-08-31 | 2012-03-15 | Toshiba Corp | 中性子測定装置 |
GB2511694B (en) * | 2011-12-22 | 2018-11-28 | Nuctech Co Ltd | A detector and a method for simultaneously detecting both gamma rays and neutron using the same |
CN105629292A (zh) * | 2011-12-22 | 2016-06-01 | 同方威视技术股份有限公司 | 一种探测器以及使用该探测器同时探测伽马射线和中子射线的方法 |
CN103176203A (zh) * | 2011-12-22 | 2013-06-26 | 同方威视技术股份有限公司 | 一种探测器以及使用该探测器同时探测伽马射线和中子射线的方法 |
EP2778716B1 (en) * | 2011-12-22 | 2020-04-29 | Nuctech Company Limited | Detector and method for simultaneously detecting gamma ray and neutron ray using same |
JP2019536065A (ja) * | 2016-11-15 | 2019-12-12 | サーモ フィッシャー サイエンティフィック メステクニック ゲゼルシャフト ミット ベシュレンクテル ハフツング | 中性子線検出システム及び方法 |
US11506801B2 (en) | 2018-10-10 | 2022-11-22 | Ebamed Sa | Prompt gamma monitor for hadron therapy |
JP2020071120A (ja) * | 2018-10-31 | 2020-05-07 | 三菱電機株式会社 | 放射線検出器 |
JP7085964B2 (ja) | 2018-10-31 | 2022-06-17 | 三菱電機株式会社 | 放射線検出器 |
CN112434403A (zh) * | 2020-10-29 | 2021-03-02 | 中国核电工程有限公司 | 一种核临界事故报警***的布置优化及阈值选取方法 |
CN113504559A (zh) * | 2021-07-05 | 2021-10-15 | 中国科学院近代物理研究所 | 一种强流脉冲宽能谱中子剂量率监测装置 |
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