Styudy of precise measurement of neutron capture cross section for radioactive nuclear wastes

• Project/Area Number: 23561019
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: NAKAMURA Shoji 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・原子力基礎工学研究センター, 研究副主幹 (90421461)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2012: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
• Keywords: 原子力ｴﾈﾙｷﾞｰ / 放射線 / 中性子捕獲断面積 / 放射性核種 / マイナーアクチニド / 核データ / ネプツニウム237 / 熱中性子捕獲断面積 / ガンマ線放出率 / プロトアクチニウム233 / 放射化法 / マイナーアクチノイド / アメリシウム243 / 同時計測

Research Abstract

The neutron capture cross-section was measured by an activation method at Kyoto Reactor Research Institute. A Gd foil was used to set Cut-off energy as 0.13eV to pay attention in the 0.489-eV resonance of Np-237. The amount for Np-237 and Np-238 were measured from measurements of gamma-rays emitted from Pa-233 and Np-238. The neutron fluxes were monitored with Co/Al and Co/Al alloy wires. The thermal-neutron capture cross-section of Np-237 was derived from the production amount of Np-238 and neutron fluxes, and obtained as 198+-10(b). It was found that this result was about 10% larger than the evaluated value (178.1(b)).

Research Products

• [Journal Article] Measurements of Neutron Capture Cross Sections for Radioactive Nuclei (2012)
  • Author(s): S.Nakamura, F.Kitatani, H.Harada, T.Fujii, A.Uehara, and H.Yamana
  • Journal Title: KURRI Progress Report 2011 Volume: １ Pages: 167-167
• [Presentation] 中性子放射化法を用いたNp-237の中性子捕獲断面積の測定 (2013)
  • Author(s): 中村詔司, 北谷文人, 原田秀郎, 藤井俊行, 上原章寛, 山名元
  • Organizer: 2013年日本原子力学会秋の大会
  • Place of Presentation: 八戸工業大学(青森県)
  • Year and Date: 2013-09-03
• [Presentation] 中性子放射化法を用いたNp-237 の中性子捕獲断面積の測定 (2013)
  • Author(s): 中村詔司、北谷文人、原田秀郎、藤井俊行、上原章寛、山名元
  • Organizer: 2013年日本原子力学会秋の大会
  • Place of Presentation: 八戸工業大学（青森県）
• [Presentation] 中性子放射化法を用いた237Npの中性子捕獲断面積測定
  • Author(s): 中村詔司、北谷文人、原田秀雄、藤井俊行、上原章寛、山名元
  • Organizer: 日本原子力学会2013年秋の大会
  • Place of Presentation: 八戸工業大学(青森県）
• [Remarks]
  • URL: http://nscience.jaea.go.jp/
• [Remarks] 核データ測定研究・原子核構造研究
  • URL: http://wwwndc.jaea.go.jp/nscience/index_J.html
• [Remarks] Resarch group for Applied Nuclear Physics
  • URL: http://nscience.jaea.go.jp/
• [Remarks]
  • URL: http://nscience.jaea.go.jp/