Nucleosynthesis of gamma-ray emitter Al-26 in the Galxy

• Project/Area Number: 21540295
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: University of Tsukuba
• Principal Investigator: KOMATSUBARA Tetsuro 筑波大学, 数理物質系, 講師 (10195852)
• Co-Investigator(Renkei-kenkyūsha): HAYAKAWA Takehito 日本原子力研究開発機構, 研究主幹 (70343944) ; SHIZUMA Toshiyuki 日本原子力研究開発機構, 研究主幹 (50282299)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 原子核(実験) / 宙元素合成 / アルミニウム26 / ガンマ線分光 / ガンマ線同時計数 / ガンマ線角度相関測定 / 原子核構造 / ゲルマニウム検出器 / 宇宙元素合 / ビッグバン / 原子核反応 / 原子核構 / ガンマ線 / スピン・パリティ / 超新星爆発 / Al-26 / 宇宙元素合成

Research Abstract

Observation of gamma-rays originated from radioactive nucleus <26>^Al, whose half life is 720 thousand yr, is the crucial proof of nuclear synthesis in the Galaxy. In order to reproduce yield of the gamma-rays from <26>^Al, information of excited states in <26>^Si, which is located in bypass sequence of the <26>^Al creation cascade, is quite important. In our present study with gamma-ray spectroscopy, we newly observed one level at 5889-keV in the <26>^Si. Spin parity of this level is determined as 0^+ by our angular correlation measurements.

Research Products

• [Journal Article] Spins and parities of astrophysically important ^<30>S states from ^<28>Si(3He, nγ)^<30>S (2011)
  • Author(s): K. Setoodehnia, S. Kubono, 他
  • Journal Title: Phys. Rev. C Volume: 83 Issue: 1 Pages: 18803-4
  • DOI: 10.1103/physrevc.83.018803
  • Peer Reviewed
• [Journal Article] Spin and parities of astrophysically important ^<30>S states from ^<28>Si(^3He,nγ)^<30>S (2011)
  • Author(s): K.Setoodehnia, T.Komatsubara
  • Journal Title: Phyaical Review Volume: C83 Pages: 18803-18803
  • Peer Reviewed
• [Journal Article] Nuclear Clusters in Astrophysics (2010)
  • Author(s): S. Kubono, Dam N. Binh, S. Hayakawa, H. Hashimoto, D. Kahl, Y. Wakabayashi, H. Yamaguchi, T. Teranishi, N. Iwasa, T. Komatsubara, S. Kato, Le H. Khiem
  • Journal Title: Nucl. Phys. A Volume: 834 Issue: 1-4 Pages: 647c-650c
  • DOI: 10.1016/j.nuclphysa.2010.01.113
  • Peer Reviewed
• [Journal Article] Direct Measurement of the ^<14>O(α,p)^<14>O Cross Section for Astrophysically Important ^<14>O + α Resonances (2010)
  • Author(s): A. Kim, I. S. Hahn, S. Kubono, 他
  • Journal Title: J. Korean Phys. Soc. Volume: 57 Issue: 1 Pages: 40-43
  • DOI: 10.3938/jkps.57.40
  • Peer Reviewed
• [Journal Article] Plasmonic activity on gold nanoparticles embedded innanopores formed in a surface layer ofsilica glass by swift-heavy-ionirradiation (2009)
  • Author(s): K. Nomura, Y. Ohki, M. Fujimaki, X. Wang, K. Awazu, T. Komatsubara
  • Journal Title: Nanotechnology Volume: Vol.20 Num.47 Issue: 47 Pages: 475306-475306
  • DOI: 10.1088/0957-4484/20/47/475306
  • Peer Reviewed
• [Journal Article] The fabrication of aligned pairsof gold nanorods in SiO_2 films byion irradiation (2009)
  • Author(s): K. Awazu, X. Wang, T. Komatsubara, J. Watanabe, Y. Matsumoto, S. Warisawa, S.Ishihara
  • Journal Title: Nanotechnology Volume: 20 Issue: 32 Pages: 325303-325303
  • DOI: 10.1088/0957-4484/20/32/325303
  • Peer Reviewed
• [Presentation] 1Mタンデトロンによる宇宙核物理 (2012)
  • Author(s): 小松原哲郎
  • 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
  • Year and Date: 2012-03-29
• [Presentation] 1MVタンデトロンによる宇宙核物理 (2012)
  • Author(s): 小松原哲郎
  • 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
  • Year and Date: 2012-03-29
• [Presentation] 26Si励起状態の角分布、角相関測定 (2012)
  • Author(s): 小松原哲郎
  • Organizer: 日本物理学会
  • Place of Presentation: 関西大学
  • Year and Date: 2012-03-25
• [Presentation] <26>^Si励起状態の角分布、角相関測定 (2012)
  • Author(s): 小松原哲郎
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
• [Presentation] ガンマ線分光による宇宙核物理学の研究 (2010)
  • Author(s): 小松原哲郎
  • Organizer: 高度制御量子ビーム応用研究創出事業研究成果報告会
  • Place of Presentation: 筑波大学
  • Year and Date: 2010-03-15
• [Presentation] Astrophysicalstudies by means of gamma-ray spectroscopy (2010)
  • Author(s): Tetsuro Komatsubara
  • Organizer: The 10th International Symposium on Origin of Matter and Evolution of Galaxies
  • Place of Presentation: University of Osaka
• [Presentation] Astrophysical studies by means of gamma-ray spectroscopy (2010)
  • Author(s): 小松原哲郎
  • Organizer: The 10^<th>. International Symposium on Origin of Matter and Evolution of the Galaxies
  • Place of Presentation: 大阪大学
• [Remarks]
  • URL: http://www.tac.tsukuba.ac.jp/~komatsu
• [Remarks]
  • URL: http://www.tac.tsukuba.ac.jp/~komatsu