The 13C-pockets in AGB Stars and Their Fingerprints in Mainstream SiC Grains
Abstract
We identify three isotopic tracers that can be used to constrain the 13C-pocket and show the correlated isotopic ratios of Sr and Ba in single mainstream presolar SiC grains. These newly measured data can be explained by postprocess AGB model calculations with large 13C-pockets with a range of relatively low 13C concentrations, which may suggest that multiple mixing processes contributed to the 13C-pocket formation in parent AGB stars.
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