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Identification of silicate and carbonaceous presolar grains by SIMS in the type-3 enstatite chondrite ALHA81189

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タイトル: Identification of silicate and carbonaceous presolar grains by SIMS in the type-3 enstatite chondrite ALHA81189
著者: Ebata, Shingo 著作を一覧する
Fagan, Timothy J. 著作を一覧する
Yurimoto, Hisayoshi 著作を一覧する
キーワード: Isotope microscope
SIMS
Imaging
Isotope ratio
Presolar grain
Meteorite
発行日: 2008年12月15日
出版者: Elsevier B.V.
誌名: Applied Surface Science
巻: 255
号: 4
開始ページ: 1468
終了ページ: 1471
出版社 DOI: 10.1016/j.apsusc.2008.05.048
抄録: An isotope ratio imaging technique using the HokuDai isotope microscope system has been applied to in-situ survey for presolar grains in the type-3 enstatite chondrite ALHA81189. Rastered and static ion beam were used for primary beam. Lateral resolution of the isotope image was achieved to be 0.4 μm for static ion beam mode and to be 0.6 μm for rastered ion beam mode. As a result, the abundances of presolar grains are 150 to 200% larger under the static ion beam mode than under the rastered ion beam mode. Development of image processing introducing isotopography of 32S-, 24Mg16O- and 56Fe- succeeded to increase efficiency of presolar grain characterization. Using the static ion beam and introducing appropriate isotopography were very useful methods of in-situ characterization of presolar grains in meteorites.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/38755
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 江端 新吾

 

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