Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
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69 巻, 6 号
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巻頭言
特集：定量分析・同位体分析のためのイオン検出器
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  • 同位体ナノスコープによる地球外物質の希ガス深さ方向分析に向けた微小粒子分析法の開発
    大槻 悠太, 馬上 謙一, 圦本 尚義
    2021 年 69 巻 6 号 p. 197-201
    発行日: 2021/12/01
    公開日: 2021/12/15
    DOIhttps://doi.org/10.5702/massspec.21-122
    ジャーナル フリー
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    Lunar and asteroidal regolith contains noble gases derived from solar wind implantation. These particles preserve ancient solar wind, which can be revealed an energy distribution of the solar wind at the period of implantation. The energy distribution of ancient solar wind can be evaluated by depth profiling of noble gases into an extraterrestrial sample. Because typical solar wind ions are implanted at less than 50 nm from the sample surface, the particle surface for analysis must be kept in its original shape. In this study, particle samples were embedded in indium metal to adjust angle and position of the sample surfaces. We measured depth profiles for 16O+, 56Fe2+, 48Ti2+ and 24Mg+ of ilmenite particles and a polished ilmenite. We obtained depth profiles of constant ion intensities from the ilmenite particles as well as the polished ilmenite. Reproducibilities for ion intensities normalized to 16O+ were up to 33% for particle samples and 19% for polished one.

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