Development of a measurement method of the absolute neutron emission rate using a multi-layered manganese bath detector

• Project/Area Number: 24760057
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied physics, general
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: MATSUMOTO Tetsuro 独立行政法人産業技術総合研究所, 計測標準研究部門, 主任研究員 (70415793)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 中性子放出率 / マンガン / 放射化 / 中性子線源 / NaI(Tl)検出器 / 不確かさ / 高純度Ge検出器 / 熱中性子 / 透過測定 / ガンマ線 / 線源

Outline of Final Research Achievements

Radioactive neutron sources such as 252Cf and 241Am-Be(a,n) are used for various purposes. The neutron emission rate (neutrons per second) of the neutron source is very important for radiation protection and safety management. In the present study, we develop a new type of manganese bath for determination of neutron emission rate of a radioactive neutron source. The manganese bath has a multilayered structure composed of polyethylene plates and manganese alloy plates containing 70 % manganese. In measurements of neutron emission rate, a neutron source is set in the center of the manganese bath at first. 56Mn is produced by the 55Mn(n,g)56Mn reaction. The neutron emission rate is finally determined by measuring gamma rays emitted from 56Mn using a NaI(Tl) scintillation detector with a 5.08 cm diameter and a 5.08 cm length and a high purity Ge detector with relative efficiency of 60 %.

Research Products

• [Journal Article] Development of a new type of manganese bath for determination of neutron emission rate of a neutron source (2015)
  • Author(s): T. Matsumoto, H.Harano, A. Masuda, J. Hori
  • Journal Title: Conference Record of 2014 IEEE Nuclear Science Symposium Volume: 未定
  • Acknowledgement Compliant
• [Journal Article] Development of absolute measurement method for epi-thermal neutrons using a LGB scintillator (2014)
  • Author(s): T. Matsumoto, A. Masuda, H. Haranoa, H. Tomita, K. Ito, J. Kawarabayashi, T. Iguchi, A. Uritani, K. Watanabe, J. Hori, Y. Sakurai
  • Journal Title: KURRI PROGRESS REPORT 2013 Pages: 210-210
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Recent Activities in Neutron Standardization at NMIJ/AIST (2015)
  • Author(s): T. Matsumoto, H.Harano, A. Masuda
  • Organizer: CCRI(III) 21th meeting
  • Place of Presentation: フランス・パリ
  • Year and Date: 2015-03-05
• [Presentation] 多層型マンガンバスによる中性子放出率導出法の確立 (2015)
  • Author(s): 松本哲郎、原野英樹、増田明彦
  • Organizer: 2014年度計量標準成果発表会
  • Place of Presentation: つくば
  • Year and Date: 2015-01-23
• [Presentation] Development of a new type of manganese bath for determination of neutron emission rate of a neutron source (2014)
  • Author(s): T. Matsumoto, H.Harano, A. Masuda, J. Hori
  • Organizer: 2014 IEEE Nuclear Science Symposium
  • Place of Presentation: アメリカ・シアトル
  • Year and Date: 2014-11-11
• [Presentation] 多層型マンガンバスを用いた中性子放出率測定法の開発 (2014)
  • Author(s): 松本哲郎、原野英樹、増田明彦、堀順一
  • Organizer: 日本原子力学会2014年秋の大会
  • Place of Presentation: 京都
  • Year and Date: 2014-09-09
• [Presentation] 中性子放出率測定のための多層型マンガンバス法の開発
  • Author(s): 松本哲郎、原野英樹、増田明彦
  • Organizer: 第５０回アイソトープ・放射線研究発表会
  • Place of Presentation: 東京大学（東京都文京区）
• [Presentation] 中性子放出率絶対測定用多層型マンガンバスの開発
  • Author(s): 松本哲郎、原野英樹、増田明彦
  • Organizer: 2013年度NMIJ成果発表会
  • Place of Presentation: 独立行政法人産業技術総合研究所（茨城県つくば市）
• [Remarks] 中性子標準ホームページ
  • URL: http://www.nmij.jp/~quant-rad/neutron/newhp.html
• [Remarks] 中性子標準グループ
  • URL: http://www.nmij.jp/~quant-rad/neutron/newhp.html
• [Remarks] 中性子標準グループ
  • URL: http://www.nmij.jp/~quant-rad/neutron/newhp.html