DEVELOPMENT OF DETECTION METHOD FOR SECULAR VARIATION OF COSMIC RAYS OVER THE PAST TEN MILLION YEARS USING COSMOGENIC NUCLEI BY NUON IN DEEP ROCK

• Project/Area Number: 21540293
• 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: Yamagata University
• Principal Investigator: SAKURAI Hirohisa 山形大学, 理学部, 教授 (60150265)
• Co-Investigator(Kenkyū-buntansha): HORIUCHI Kazuho 弘前大学, 理工学研究科, 助教 (00344614) ; IWATA Naoyoshi 山形大学, 理学部, 講師 (70302289)
• Co-Investigator(Renkei-kenkyūsha): MATSUZAKI Hiroyuki 東京大学, 大学院・工学系研究科, 准教授 (60313194) ; DOSHITA Norihiro 山形大学, 理学部, 助教 (90451658)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 宇宙線永年変動 / ミューオン / 宇宙線生成核種 / Be-10 / 地下深部岩石 / 宇宙線 / 生成核種 / 高エネルギーミューオン / Be-10, Al-26 / 花崗岩 / AMS測定 / Be-10,Al-26,Be-7 / 鉱物分離 / ビーム照射

Research Abstract

The rocks in deep underground are exposed by high energy muon for long time and record an accumulation of muon induced cosmogenic nuclides of Be-10 and Al-26. We have measured the cross-sections of production rates of Be-10 and Al-26 for SiO2 plates using the muon beam with the energy of 160 Gev/c at CERN. Also, the efficiency was investigated for the extraction of SiO2 from granite rocks.

Research Products

• [Journal Article] Production rates of nuclide in synthetic silica induced by high-energy mu-on beam at CERN (2011)
  • Author(s): H. SAKURAI, Y. TAKAHASHI, N. DOSHITA, T. OE, T. SATO, S. KIKUCHI, K. HORIUCHI, N. SASAKI, K. KONDO, N. IWATA, F. TOKANAI, S. GUNJI, H. MATSUZAKI
  • Journal Title: Proceedings of the 32^<nd> ICRC Volume: 4
• [Journal Article] DAILY VARIATION OF COSMOGENIC NUCLIDE BE-7 CONCENTRATIONS IN HIGH ALTITUDE ATMOSPHERE AT MT. CHACALTAYA AT THE SOLAR MINIMUM FROM 2009 (2011)
  • Author(s): H. SAKURAI, T. SATO, Y. TAKAHASHI, T. OE, S. KIKUCHI, K. MASUDA, Y. MATSUBARA, H. MIYAHARA, H. OHASHI, W. TAVERA^5, J. SALINAS
  • Journal Title: Proceedings of the 32^<nd> ICRC Volume: 4
• [Journal Article] Production rates of nuclide in synthetic silica induced by high-energy mu-on beam at CERN (2011)
  • Author(s): H.Sakurai, et al
  • Journal Title: Proceedings of the 32^<nd> ICRC Volume: SH4.3
• [Journal Article] Daily Variation of Cosmogenic Nuclide Be-7 Concentrations in High Altitude Atmosphere at Mt.Chacaltaya at the solar minimum from 2009 (2011)
  • Author(s): H.Sakurai, et al
  • Journal Title: Proceedings of the 32^<nd> ICRC Volume: SH4.3
• [Journal Article] Simulated 14C production rates for the troposphere and stratosphere in weak geomagnetic intensity at 26000 yr BP (2011)
  • Author(s): T.Sato, et al
  • Journal Title: Proceedings of the 32^<nd> ICRC Volume: SH4.3
• [Journal Article] Precise comparison between 14C ages from Choukai Jindai cedar with IntCa104 raw data (2010)
  • Author(s): K.Suzuki, H.Sakurai, et al
  • Journal Title: Radiocarbon Volume: 52 Pages: 1599-1609
  • Peer Reviewed
• [Presentation] Production rates of nuclide in synthetic silica induced by high-energy mu-on beam at CERN (2011)
  • Author(s): H. Sakurai
  • Organizer: the 32^<nd> ICRC
  • Place of Presentation: Beijing
• [Presentation] DAILY VARIATION OF COSMOGENIC NUCLIDE BE-7 CONCENTRATIONS IN HIGH ALTITUDE ATMOSPHERE AT MT. CHACALTAYA AT THE SOLAR MINIMUM FROM 2009 (2011)
  • Author(s): H. SAKURAI
  • Organizer: THE 32^<ND> ICRC
  • Place of Presentation: BEIJING
• [Presentation] 2000年から11年間の宇宙線生成核種Be-7の大気中濃度変動 (2011)
  • Author(s): 櫻井敬久
  • Organizer: 日本物理学会
  • Place of Presentation: 弘前大学
• [Presentation] ミューオンによるin-situ宇宙線生成核種II (2010)
  • Author(s): 櫻井敬久
  • Organizer: 日本物理学会
  • Place of Presentation: 九州工業大学
• [Presentation] 過去9年間の宇宙線生成核種Be-7濃度の濃度変動について (2009)
  • Author(s): 櫻井敬久
  • Organizer: 日本物理学会
  • Place of Presentation: 甲南大学
  • Year and Date: 2009-09-11