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

2011 Fiscal Year Final Research Report

• 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
• 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 Pages: 54-1-10
  • DOI: DOI:10.1140/epja/i2012-12054-1
  • Peer Reviewed
• [Journal Article] GEM-MSTPC : An active-target type detector in low-pressure He/CO_2 mixed gas (2012)
  • Author(s): H. Ishiyama, K. Yamaguchi, Y. Mizoi, Y. X. Watanabe, S. K. Das, T. Hashimoto, H. Miyatake, Y. Hirayama, N. Imai, M. Oyaizu, S. C. Jeong, T. Fukuda, S. Mitsuoka, H. Makii, T. K. Sato
  • Journal Title: Journal of Instrumentation Volume: 7 Pages: C03036-1-16
  • DOI: 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 Pages: 030101-1-10
  • DOI: DOI:10.1103/PhysRevSTAB.15.030101
  • Peer Reviewed
• [Journal Article] Spin-polarization of radioactive^<123> In_<g. s.> by the tilted-foil method (2011)
  • Author(s): Y. Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, N. Imai, K. Matsuta, H. Miyatake, T. Hashimoto, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H. Kawakami, I. Nishinaka, K. Nishio, H. Makii, S. Mituoka, S. Momota, A. Osa, Y. Otokawa
  • Journal Title: THE European Physical Journal A Volume: 11 Pages: 138-1-5
  • DOI: DOI:10.1140/epja/i2011-11138-8
  • Peer Reviewed
• [Journal Article] Adhesion improvement of HIVIPP^<12> C target (2011)
  • Author(s): I. Sugai, Y. Takeda, H. Kawakami, N. Ohta, H. Makii, H. Miyatake
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A Volume: 655 Pages: 24-33
  • DOI: DOI:10.1063/1.3670740
  • Peer Reviewed
• [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] 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)
  • Year and Date: 20101104-05
• [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)
  • Year and Date: 20100823-27
• [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