| Project/Area Number |
24654147
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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 |
Solid earth and planetary physics
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| Research Institution | Okayama University of Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAKAGAWA Masuo 岡山理科大学, 理学部, 教授 (70148683)
TOYODA Shin 岡山理科大学, 理学部, 教授 (40207650)
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| Co-Investigator(Renkei-kenkyūsha) |
KUMAGAI Hidenori 海洋研究開発機構, 海底資源研究開発センター, グループリーダー代理 (10344285)
KINOSHITA Masataka 海洋研究開発機構, 高知コア研究所, 所長 (50225009)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 地震予知 / 海底 / 放射線 / ラドン / 長期変動 / NaI / ガンマ線計測装置 |
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| Outline of Final Research Achievements |
A low power consumption type gamma-ray spectra recording apparatus for deep seas was developed, and this time a gamma-ray spectroscopy equipment (NaI) equipped with this apparatus was installed at a cool spring point of submarine 2600m in the offing of the Kumano-nada Sea. After 3.5 months we recovered this equipment safely, and confirm the operation of gamma-ray spectral measurement. There were no large changes in the conversion U content (the radon density) for 3.5 months at this cool spring point of submarine 2600m in the offing of the Kumano-nada Sea. There was no direct correlation between earthquakes and the radon density. However we used low cost alkaline batteries, then more long-term submarine gamma-ray spectra measurements are possible. We can expect to measure long-term gamma-ray spectral measurement at the various locations of submarine in future.
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