Development of the measurement system for neutron-capture cross sections using a surrogate reaction

2009 Fiscal Year Final Research Report

• Project/Area Number: 19740154
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization (2009); Japan Atomic Energy Agency (2007-2008)
• Principal Investigator: MAKII Hiroyuki High Energy Accelerator Research Organization, 先端基礎研究センター, 研究員 (20425573)
• Project Period (FY): 2007 – 2009
• Keywords: 実験核物理 / 中性子捕獲断面積 / インビームγ線核分光

Research Abstract

Neutron-capture reaction on unstable nuclei plays an important role in stellar nucleosynthesis. However, measurements of the neutron-capture cross sections of the unstable nuclei are very difficult. The main reasons of the difficulty are due to the preparation and/or radioactivity of the sample. Hence we designed new experiment in order to measure the γ rays from the nuclei produced by surrogate reaction. With use of this system, we could detect the γ-ray from the surrogate reaction.

Research Products

• [Journal Article] In-beamγ-ray spectroscopy of^<248,250,252>Cf by neutron-transfer reactions using a Cf target (2010)
  • Author(s): R.Takahashi, T.Ishii, M.Asai, D.Nagae, H.Makii, K.Tsukada, A.Toyoshima, Y.Ishii, M.Matsuda, A.Makishima, T.Shizuma, T.Kohno, M.Ogawa
  • Journal Title: Physical Review C 81 Pages: 057303
  • Peer Reviewed
• [Journal Article] E1 and E2 cross sections of the^<12>C(α,γ^0)^<16> O reaction using pulsedαbeams (2009)
  • Author(s): H.Makii, Y.Nagai, T.Shima, M.Segawa, K.Mishima, H.Ueda, M.Igashira, T.Ohsaki
  • Journal Title: Physical Review C 80 Pages: 065802
  • Peer Reviewed
• [Journal Article] Observation of high-j quasiparticle states in^<249> Cm by in-beam γ-ray spectroscopy using heavy-ion transfer reactions (2008)
  • Author(s): T.Ishii, H.Makii, M.Asai, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, S.Shigemastsu, J.Kaneko, T.Shizuma, H.Toume, I.Hossain, T.Kohno, M.Ogawa
  • Journal Title: Physical Review C 78 Pages: 054309
  • Peer Reviewed
• [Journal Article] Z dependence of the N=152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich^<245,246>Pu (2007)
  • Author(s): H.Makii, T.Ishii, M.Asai, A.Toyoshima, M.Matsuda, A.Makishima, J.Kaneko, H.Toume, S.Ichikawa, S.Shigematsu, T.Kohno, M.Ogawa
  • Journal Title: Physical Review C 76 Pages: 061301
  • Peer Reviewed
• [Journal Article] Neutron-induced reactions using a γ-ray detector in^<12>C(α,γ)^<16>O reaction study (2007)
  • Author(s): H.Makii, Y.Nagai, K.Mishima, M.Segawa, T.Shima, M.Igashira
  • Journal Title: Physical Review C 76 Pages: 022801
  • Peer Reviewed
• [Journal Article] Ground-state bands of neutron-rich^<236>Th and^<242>U nuclei and implication of spherical shell closure at N=164 (2007)
  • Author(s): T.Ishii, H.Makii, M.Asai, H.Koura, S.Shigematsu, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, J.Kaneko, H.Toume, I.Hossain, T.Shizuma, S.Ichikawa, T.Kohno, M.Ogawa
  • Journal Title: Physical Review C 76 Pages: 011303
  • Peer Reviewed
• [Presentation] 核子移行反応で生成されるアクチノイド原子核の核分裂片質量数分布 (2010)
  • Author(s): 西尾勝久、西中一朗、光岡真一、牧井宏之、古高和禎, 若林泰夫, 高橋竜太, 石井哲朗, 千葉敏、廣瀬健太郎, 大槻勤
  • Organizer: 日本原子力学会2010年秋の大会
  • Place of Presentation: 札幌
  • Year and Date: 20100915-20100917
• [Presentation] ^<238>U(^<18>O,^<16>O)反応による複合核^<240>Uの核分裂確率の測定 (2010)
  • Author(s): 西尾勝久、西中一朗、牧井宏之、光岡真一、古高和禎, 若林泰夫, 高橋竜太, 浅井雅人、石井哲朗, 千葉敏、廣瀬健太郎, 大槻勤
  • Organizer: 日本原子力学会2010年春の年会
  • Place of Presentation: 水戸
  • Year and Date: 20100326-20100328
• [Presentation] E1 and E2 cross sections of the^<12>C(α,γ)^<16>O reaction at E_eff~1.2 MeV using pulsedαbeams (2010)
  • Author(s): H.Makii, H.Ueda, Y.Temma, Y.Nagai, T.Shima, S.Fujimoto, M.Segawa, K.Mishima, J.Nishiyama, M.Igashira
  • Organizer: 10th.International Symposium on Origin of Matter and Evolution of the Galaxies(OMEG10)
  • Place of Presentation: Osaka
  • Year and Date: 20100308-20100310
• [Presentation] 代理反応による不安定核の中性子捕獲断面積測定 (2010)
  • Author(s): 牧井宏之
  • Organizer: 宇宙連絡協議会主催第3回研究戦略ワークショップ「J-PARC中性子ビームラインでの宇宙核物理研究及び関連する研究
  • Place of Presentation: 上野
  • Year and Date: 2010-11-05
• [Presentation] ^<12>C(α,γ)^<16>O反応におけるE1及びE2断面積測定 (2008)
  • Author(s): 牧井宏之
  • Organizer: 国立天文台研究会「rプロセス元素合成の統合的理解-量子ビームで探る宇宙進化の理解を目指して-
  • Place of Presentation: 筑波大学
  • Year and Date: 2008-03-14
• [Presentation] E1and E2 cross sections of the12C(a,g)16Oreaction at E_eff~1.4 MeV using pulsedαbeams (2007)
  • Author(s): H.Makii, Y.Nagai, K.Mishima, M.Segawa, T.Shima, H.Ueda, M.Igashira
  • Organizer: 10th.International Symposium on Origin of Matter and Evolution of the Galaxies(OMEG07)
  • Place of Presentation: 札幌
  • Year and Date: 2007-12-05
• [Presentation] 原子力機構における代理反応測定計画 (2007)
  • Author(s): 牧井宏之
  • Organizer: 2007年度核データ研究会
  • Place of Presentation: 東海
  • Year and Date: 2007-11-30