2011 Fiscal Year Final Research Report
Interdis ciplinary study on isotopic geochemistry and particle physics
| Project/Area Number |
21244086
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Hiroshima University |
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Principal Investigator |
HIDAKA Hiroshi 広島大学, 大学院・理学研究科, 教授 (10208770)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 中性子捕獲 / 同位体 / 消滅核種 / 天然原子炉 / 隕石 / ジルコン |
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| Research Abstract |
The variable types of neutron capture reactions under the variable environmental conditions were found from the isotopic results of lunar surface materials, martian meteorites, gas-rich meteorites, stony meteorites having long cosmic-ray exposure ages, stony-iron meteorites, and the Oklo natural reactor samples. The quantitative characterization of the neutron capture reactions were performed from the isotopic shifts of^<150> Sm/^<149> Sm,^<156> Gd/^<155> Gd, and^<158> Gd/^<157> Gd in individual samples because of the large neutron capture cross sections of^<149> Sm,^<155> Gd and^<157> Gd.
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[Remarks] 総説1.日高洋,オクロ天然原子炉についての基礎知識と最近の研究の進歩, RADIOISOTOPES,査読有, 2012,印刷中
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[Remarks] 2.日高洋, 20億年前の原子炉(オクロ現象)と同位体化学,化学と教育,査読有, 58, 2010, 456-457
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[Remarks] 3.日高洋,天然における核反応現象に基づく地球化学および宇宙化学的研究,放射化学会ニュース,査読有, 19, 2009, 16-18.
