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  1. D300 大学院環境学研究科
  2. D300a 雑誌掲載論文
  3. 学術雑誌

Isotopic Evidence for Multi-stage Cosmic-ray Exposure Histories of Lunar Meteorites: Long Residence on the Moon and Short Transition to the Earth

http://hdl.handle.net/2237/26934
http://hdl.handle.net/2237/26934
3c411b2b-bf0a-4e87-af77-dab0c3e997f6
名前 / ファイル ライセンス アクション
Hidaka_2017_AJ_153_274.pdf Hidaka_2017_AJ_153_274.pdf (521.3 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-09-04
タイトル
タイトル Isotopic Evidence for Multi-stage Cosmic-ray Exposure Histories of Lunar Meteorites: Long Residence on the Moon and Short Transition to the Earth
言語 en
著者 Hidaka, Hiroshi

× Hidaka, Hiroshi

WEKO 73341

en Hidaka, Hiroshi

Search repository
Sakuma, Keisuke

× Sakuma, Keisuke

WEKO 73342

en Sakuma, Keisuke

Search repository
Nishiizumi, Kunihiko

× Nishiizumi, Kunihiko

WEKO 73343

en Nishiizumi, Kunihiko

Search repository
Yoneda, Shigekazu

× Yoneda, Shigekazu

WEKO 73344

en Yoneda, Shigekazu

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2017. The American Astronomical Society
キーワード
主題Scheme Other
主題 meteorites
キーワード
主題Scheme Other
主題 meteors
キーワード
主題Scheme Other
主題 meteoroids
抄録
内容記述 It is known that most lunar meteorites have complicated cosmic-ray exposure experiences on the Moon and in space. In this study, cosmic-ray irradiation histories of six lunar meteorites, Dhofar 489, Northwest Africa 032 (NWA 032), NWA 479, NWA 482, NWA 2995, and NWA 5000, were characterized from neutron-captured isotopic shifts of Sm and Gd, and from the abundances of long-lived cosmogenic radionuclides like 10Be, 26Al, 36Cl, and 41Ca. Sm and Gd isotopic data of all of six meteorites show significant isotopic shifts of 149Sm–150Sm and 157Gd–158Gd caused by accumulation of neutron capture reactions due to cosmic-ray irradiation, corresponding to the neutron fluences of (1.3–9.6)×1016 n cm^−2. In particular, very large Sm and Gd isotopic shifts of NWA 482 are over those of a lunar regolith 70002, having the largest isotopic shifts among the Apollo regolith samples, corresponding to cosmic-ray exposure duration over 800 million years in the lunar surface (2π irradiation). Meanwhile, the concentrations of cosmogenic radionuclides for individual six meteorites show the short irradiation time less than one million years as their bodies in space (4π irradiation). Our data also support the results of previous studies, revealing that most of lunar meteorites have long exposure ages at shallow depths on the Moon and short transit times from the Moon to the Earth.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 IOP publishing
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.3847/1538-3881/aa7139
ISSN
収録物識別子タイプ PISSN
収録物識別子 0004-6256
書誌情報 en : The Astronomical Journal

巻 153, 号 6, p. 274-274, 発行日 2017-06
著者版フラグ
値 publisher
URI
識別子 https://doi.org/10.3847/1538-3881/aa7139
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/26934
識別子タイプ HDL
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