@article{oai:nipr.repo.nii.ac.jp:00004619, author = {Koike, Osamu and Yurimoto, Hisayoshi and Nagasawa, Hiroshi and Sueno, Shigeho}, journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites}, month = {May}, note = {P(論文), 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.}, pages = {357--363}, title = {Ion microprobe mesearments of Mg isotopes in Type B1 CAI of Allende meteorite}, volume = {6}, year = {1993} }