隕石中のリチウム同位体比

概要

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Many experimental results and theoretical considerations have been reported in relation to the isotope abundances of meteoritic lithium. The methods of the experimental investigations are grouped in two categories. One is surface ionization mass spectrometry and the other is secondary ion mass spectrometry. In almost all isotope analyses, and in using both experimental methods, 7Li/6Li ratios in meteorites are reported not to have any anomaly compared with the ratios for terrestrial samples. However, lithium is one of the less abundant elements together with berillium and boron, and the synthetic mechanism of these elements and isotopes are not clarified both experimentally and theoretically. We have possibility that there may be an anomaly of lithium isotope abundances in meteorites according to several theoretical considerations. In this report, mass spectrometric results of lithium isotope analyses for many kinds of meteorites are reviewed and the theoretical and experimental consideration about the nucleosynthesis of lithium are searched.
日本質量分析学会の論文
1996-02-20