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

Shingo Ebata, Timothy Jay Fagan, Hisayoshi Yurimoto

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    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 150-200% 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.

    Original languageEnglish
    Pages (from-to)1468-1471
    Number of pages4
    JournalApplied Surface Science
    Volume255
    Issue number4
    DOIs
    Publication statusPublished - 2008 Dec 15

    Fingerprint

    Silicates
    Secondary ion mass spectrometry
    Ion beams
    Isotopes
    Meteorites
    Image processing
    Microscopes
    Imaging techniques

    Keywords

    • Imaging
    • Isotope microscope
    • Isotope ratio
    • Meteorite
    • Presolar grain
    • SIMS

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films

    Cite this

    Identification of silicate and carbonaceous presolar grains by SIMS in the type-3 enstatite chondrite ALHA81189. / Ebata, Shingo; Fagan, Timothy Jay; Yurimoto, Hisayoshi.

    In: Applied Surface Science, Vol. 255, No. 4, 15.12.2008, p. 1468-1471.

    Research output: Contribution to journalArticle

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    abstract = "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 150-200{\%} 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.",
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    AU - Fagan, Timothy Jay

    AU - Yurimoto, Hisayoshi

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    AB - 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 150-200% 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.

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