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Cosmic Ray Induced 53Mn in Yamato-7301(j), -7305(k) and -7304(m) Meteorites
https://nipr.repo.nii.ac.jp/records/889
https://nipr.repo.nii.ac.jp/records/889ac46472b-4682-4471-9ba6-22cadd774b1f
名前 / ファイル | ライセンス | アクション |
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KJ00000011862 (1.8 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1978-02-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Cosmic Ray Induced 53Mn in Yamato-7301(j), -7305(k) and -7304(m) Meteorites | |||||
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) |
Nishizumi, Kunihiko
× Nishizumi, Kunihiko× Imamura, Mineo× Honda, Masatake |
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著者所属(英) | ||||||
en | ||||||
Department of Chemistry, College of Science, Rikkyo University | ||||||
著者所属(英) | ||||||
en | ||||||
Institute for Nuclear Study, The University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
The Institute for Solid State Physics, The University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Cosmic ray-induced long-lived nuclide, ^<53>(Mn) (t_<1/2>=3.7×(10)^6y) has been determined by the neutron activation analysis in Yamato-7301 (j), -7305 (k), and -7304 (m) meteorites, and the contents were found to be 102±6,357±19 and 417±22dpm ^<53>(Mn)/kg Fe respectively. The content found in Yamato-7304 is in good agreement with other chondrites, and the slightly lower value in Yamato-7305,which is also common in others, may be due to some minor effects. In contrast, the content of ^<53>(Mn) in Yamato-7301 is remarkably low, lower than that of any other stone meteorites of relatively long exposure age so far studied. Several possible mechanisms are discussed to explain the puzzling ^<53>(Mn) activity in Yamato-7301 : 1) Long terrestrial age of about 7 m. y., and the decay of ^<53>(Mn). 2) Heavy preatomospheric shielding of more than 70cm, and low production rate of ^<53>(Mn). 3) Multistage irradiation history, and undersaturation of ^<53>(Mn). 4) A combined mechanism of the above two or three factors. | |||||
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 8, p. 209-219, 発行日 1978-02 |