| タイトル | Ca isotope variations in Allende |
| 著者（英） | Lugmair, G. W.; Jungck, M. H. A.; Shimamura, T. |
| 著者所属（英） | California Univ. |
| 発行日 | 1984-12-01 |
| 言語 | eng |
| 内容記述 | Ca-isotope measurements of Allende Ca-Al-rich inclusions (CAIs), together with those on an apatite-enriched fraction from Orgueil, indicate the existence of widespread excesses on the neutron-rich isotope Ca-48. Isotopic anomalies are noted in 7 out of 11 CAIs analyzed. This abundance of isotopic excesses places Ca alongside Ti and O, although no clear correlation has yet been found between Ca-48 and Ti-50, which are thought to be coproduced by neutron-rich nucleosynthetic processes within stars. It is suggested that the higher volatility of Ca, by comparison with Ti compounds, led to a variable dilution with isotopically normal Ca in vaporization and recondensation processes in stellar envelopes, the interstellar medium, and/or the solar nebula. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 85A22035 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/393176 |
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