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

2011 Fiscal Year Final Research Report

• 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
• 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

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 Pages: 0980(1-4)
• [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 Pages: 0364(1-4)
• [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
  • Year and Date: 20110900
• [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
  • Year and Date: 20110000
• [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
  • Year and Date: 20110000
• [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
  • Year and Date: 20100900