Preparation of highly enriched 12C target for measurement of stellar 12C(α,γ) reaction.

• Project/Area Number: 22740181
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: MAKII Hiroyuki 独立行政法人日本原子力研究開発機構, 先端基礎研究センター, 研究員 (20425573)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 実験核物理 / 恒星内元素合成 / イオン注入 / 高濃縮標的

Research Abstract

The^<12> C(α,γ)^<16> O reaction plays an important role in determining the mass fraction of^<12> C and^<16> O after helium burning, abundance distribution of elements between carbon and iron, and the iron-core mass before a supernova explosion. The reaction cross section at the stellar temperature still has large uncertainty. In order to measure the cross section precisely near the stellar temperature, we produced the enriched 12C target.

Research Products

• [Journal Article] Tilted-foil technique for producing a spin-polarized radioactive isotope beam (2012)
  • Author(s): Y. Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, H. Miyatake, S. Momota, T. Hashimoto, N. Imai, K. Matsuta, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H. Kawakami, H. Kawamura, I. Nishinaka, K. Nishio, H. Makii, S. Mitsuoka, A. Osa
  • Journal Title: European Physical Journal A Volume: 48 Issue: 5 Pages: 54-54
  • DOI: 10.1140/epja/i2012-12054-1
  • Peer Reviewed
• [Journal Article] GEM-MSTPC : An active-target type detector in low-pressure He/CO2 mixed gas (2012)
  • Author(s): H.Ishiyama, et al
  • Journal Title: JINST Volume: 7 Issue: 03 Pages: 138-142
  • DOI: 10.1088/1748-0221/7/03/c03036
  • Peer Reviewed
• [Journal Article] Physical Review Special Topics (2012)
  • Author(s): M. Okada, K. Niki, Y. Hirayama, N. Imai, H. Ishiyama, S. C. Jeong, I. Katayama, H. Miyatake, M. Oyaizu, Y. X. Watanabe, S. Arai, H. Makii, Y. Wakabayashi
  • Journal Title: Accelerators and Beams Volume: 15 Issue: 3
  • DOI: 10.1103/physrevstab.15.030101
  • Peer Reviewed
• [Journal Article] Wall-loss distribution of charge breeding ions in an electron cyclotron resonance ion source (2012)
  • Author(s): S.C.Jeong, et al
  • Journal Title: Rev.Sci.Instrum. Volume: 83 Issue: 2 Pages: 24-33
  • DOI: 10.1063/1.3670740
  • Peer Reviewed
• [Journal Article] GEM-MSTPC : An active-target type detector in low-pressure He/Co_2 mixed gas (2012)
  • Author(s): H.Ishiyama, et al
  • Journal Title: JINST Volume: 7
  • Peer Reviewed
• [Journal Article] Spin-polarization of radioactive 123Ing.s.by the tilted-foil method (2011)
  • Author(s): Y.Hirayama, et al
  • Journal Title: Eur.Phys.J.A Volume: 47 Issue: 11 Pages: 138-138
  • DOI: 10.1140/epja/i2011-11138-8
  • Peer Reviewed
• [Journal Article] In-beam g-ray spectroscopy of ^<248,250,250>Cf by neutron-transfer reaction using a Cf target (2010)
  • Author(s): R.Takahashi, T.Ishii, M.Asai, D.Nagae, H.Makii, 他8名
  • Journal Title: Physical Review Volume: 81
  • Peer Reviewed
• [Presentation] ^<12>C(α,γ)^<16>O反応と元素合成:つくばタンデムでの実験可能性について (2012)
  • Author(s): 牧井宏之
  • Organizer: 筑波大学複合タンデム加速器施設の新展開-タンデム加速器更新計画と今後の研究展望-
  • Place of Presentation: 筑波大学、つくば市(招待講演)
  • Year and Date: 2012-03-29
• [Presentation] Measurement of the C^^<12>(α,γ) O^^<16> reaction at TRIAC (2011)
  • Author(s): H. Makii, H. Miyatake, Y. Wakabayashi, H. Ishiyama, K. Niki, M. Okada, N. Imai, Y. X. Watanabe, Y. Hirayama, S. C. Jeong, T. Shima, I. Nishinaka, S. Mitsuoka, K. Nishio, S. Chiba
  • Organizer: 11th International Symposium on Origin of Matter and Evolution of Galaxies(OMEG 11)
  • Place of Presentation: 理化学研究所(埼玉県)
  • Year and Date: 2011-11-17
• [Presentation] Measurement of the ^<12>C(α,γ)^<16>O reaction at TRIAC (2011)
  • Author(s): H.Makii, et al
  • Organizer: 11th Int.Symp.on Origin of Matter and Evolution of Galaxies
  • Place of Presentation: 理化学研究所、和光市
  • Year and Date: 2011-11-17
• [Presentation] Measurement of the E1 and E2 cross sections of the C^^<12>(α,γ) O^^<16> reaction (2010)
  • Author(s): H. Makii
  • Organizer: 宇宙連絡協議会主催第3回OMEG Institute「^<12> C(α,γ)^<16> O reaction」
  • Place of Presentation: 理化学研究所(埼玉県)
  • Year and Date: 2010-11-01
• [Presentation] Measurement of the E1 and E2 cross sections of the ^<12>C(α,γ)^<16>O reaction (2010)
  • Author(s): 牧井宏之
  • Organizer: 宇宙核連絡協議会主催第3回OMEG Institute「^<12>C(α,γ)^<16>O reaction」
  • Place of Presentation: 理化学研究所(埼玉県)
  • Year and Date: 2010-11-01
• [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: 宇宙核連絡協議会主催第3回ワークショップ「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: 日本原子力研究開発機構システム計算科学センター(東京都)
• [Presentation] Preparation for the measurement of the^<12> C(α,γ)^<16> O reaction at TRIAC (2010)
  • Author(s): H. Makii, H. Miyatake, Y. X. Watanabe, N. Imai, H. Ishiyama, Y. Hirayama, K. Niki, M. Okada, S. C. Jeong, S. Chiba, S. Mituoka, K. Nishio, Y. Wakabayashi
  • Organizer: 3rd International Conference on "Frontiers in Nuclear Structure, Astrophysics, and Reaction"(FINUSTAR3)
  • Place of Presentation: Rhodes島(ギリシャ)
• [Presentation] Preparation for the measurement of the ＾<12>C(α,γ)^<16>O reaction at TRIAC (2010)
  • Author(s): H.Makii, 他12名
  • Organizer: 3^<rd> International Conference on "Frontiers in Nuclear Structure, Astrophysics, and Reaction" (FINDSTAR3)
  • Place of Presentation: Rhodes島(ギリシャ)