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Primordial rare gases in Belgica-7904 (C2) carbonaceous chondrite
https://nipr.repo.nii.ac.jp/records/1729
https://nipr.repo.nii.ac.jp/records/1729c4cf6d31-07dc-4065-b4c2-87f80913d289
名前 / ファイル | ライセンス | アクション |
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KJ00000012361 (1.3 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1984-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Primordial rare gases in Belgica-7904 (C2) carbonaceous chondrite | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Nagao,Keisuke
× Nagao,Keisuke× Inoue,Kensaku× Ogata,Koreichi |
|||||
著者所属(英) | ||||||
en | ||||||
Okayama University of Science/Okayama University of Science/Okayama University of Science | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Belgica-7904 (C2) carbonaceous chondrite was analyzed for rare gas isotopic compositions with stepwise heating extraction method. Primordial rare gases are dominant, whereas the concentrations of radiogenic ^4(He) and ^<40>(Ar) are lower than those to be expected from radioactive decay. Cosmic-ray exposure age of 0.7 my was obtained with cosmogenic ^<21>(Ne). Ne-E component was found in a 900-1100℃ range and its concentration was 1.2×(10)^<-9>(cm)^3 STP/g. Excessive heavy Xe isotopes in a 900℃ fraction have CCF-Xe spectrum. ^<20>(Ne), ^<84>(Kr) and ^<132>(Xe) in the highest temperature fraction of 1800℃ are enriched. The enrichments may be due to a stellar nucleosynthesis or due to a neutron irradiation of high temperature condensates. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 35, p. 257-266, 発行日 1984-12 |