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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis
| Title: | Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis |
| Authors: | Bajo, Ken-ichi Browse this author | | Olinger, Chad T. Browse this author | | Jurewicz, Amy J. G. Browse this author | | Burnett, Donald S. Browse this author | | Sakaguchi, Isao Browse this author | | Suzuki, Taku Browse this author | | Itose, Satoru Browse this author | | Ishihara, Morio Browse this author | | Uchino, Kiichiro Browse this author | | Wieler, Rainer Browse this author | | Yurimoto, Hisayoshi Browse this author →KAKEN DB |
| Keywords: | solar wind | | depth profile | | helium | | NASA Genesis mission | | post-ionization |
| Issue Date: | 2015 |
| Publisher: | The Geochemical Society of Japan |
| Journal Title: | Geochemical Journal |
| Volume: | 49 |
| Issue: | 5 |
| Start Page: | 559 |
| End Page: | 566 |
| Publisher DOI: | 10.2343/geochemj.2.0385 |
| Abstract: | The distribution of solar-wind ions in Genesis mission collectors, as determined by depth profiling analysis, constrains the physics of ion-solid interactions involving the solar wind. Thus, they provide an experimental basis for revealing ancient solar activities represented by solar-wind implants in natural samples. We measured the first depth profile of 4He in a Genesis collector; the shallow implantation (peaking at <20 nm) required us to use sputtered neutral mass spectrometry with post-photoionization by a strong field. The solar wind He fluence calculated using depth profiling is ~8.5 × 1014 cm-2. The shape of the solar wind 4He depth profile is consistent with TRIM simulations using the observed 4He velocity distribution during the Genesis mission. It is therefore likely that all solar-wind elements heavier than H are completely intact in this Genesis collector and, consequently, the solar particle energy distributions for each element can be calculated from their depth profiles. Ancient solar activities and space weathering of solar system objects could be quantitatively reproduced by solar particle implantation profiles. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/59846 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 圦本 尚義
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