Ion microprobe mesearments of Mg isotopes in Type B1 CAI of Allende meteorite
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概要
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Magnesium isotopes in individual mineral grains of a Ca-Al rich inclusion from the Allende meteorite have been measured by secondary ion mass spectrometry. An electrostatic peak switching system was used to make a precise isotopic measurement in high mass resolution mode (M/⊿M=∿4000). The inclusion shows excess of ^<26>Mg correlated with the ^<27>Al/^<24>Mg ratio. The results suggest that live ^<26>Al decayed in the inclusion which formed simultaneously in the solar nebula. The relative abundance of ^<26>Al(^<26>Al/^<27>Al=3.12×10^<-5>) is close to the "canonical" value (^<26>Al/^<27>Al=∿5×10^<-5>) for coarse-grained CAIs.
- 国立極地研究所の論文
著者
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NAGASAWA Hiroshi
Department of Physics, Osaka City University
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Koike Osamu
Institute Of Geoscience University Of Tsukuba
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Sueno S
Univ. Tsukuba Ibaraki Jpn
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Sueno Shigeho
Institute Of Geoscience The University Of Tsukuba
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Yurimoto Hisayoshi
Institute of Geoscience, University of Tsukuba
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Yurimoto H
Tokyo Inst. Of Technol. Tokyo Jpn
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Yurimoto Hisayoshi
Institute Of Geoscience University Of Tsukuba
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Nagasawa Hiroshi
Department Of Anesthesiology Meikai University School Of Dentistry
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