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

Shingo Ebata, Timothy J. Fagan, Hisayoshi Yurimoto

Research output: Contribution to journalArticlepeer-review

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 32 S - , 24 Mg 16 O - and 56 Fe - 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

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Identification of silicate and carbonaceous presolar grains by SIMS in the type-3 enstatite chondrite ALHA81189'. Together they form a unique fingerprint.

Cite this