| Project/Area Number |
15K13488
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Musashino Art University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
HORIUCHI Kazuho 弘前大学, 理工学研究科, 助教 (00344614)
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| Research Collaborator |
ZHOU Limin East China Normal University, Professor
XU Hongyang East China Normal University, Professor
SAKASHITA Wataru 筑波大学, 生命環境系, 研究員
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 宇宙線 / 宇宙線生成核種 / 太陽活動 / 炭酸塩堆積物 / ベリリウム10 / 堆積物 |
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| Outline of Final Research Achievements |
In this study, we conducted basic analysis of beryllium-10 content in carbonate sediments to explore methods which enable the reconstruction of past cosmic ray variations with one year resolution. Characteristics of tufa deposits and travertine sediments, concentrations in the rainy and dry seasons, and the secular variation were analyzed. In addition, beryllium-9 and trace elements were analyzed. As a result, beryllium-10 calibrated with beryllium-9 and trace element shows variations that are consistent with cosmic ray variations measured by neutron monitors.
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