Description
Most of supernova-originating presolar grains, such as silicon carbide type X (SiC X) and low-density graphite, show excesses of ^28^Si. Some of them also indicate evidence for the original presence of short-lived nuclei ^44^Ti. In order to reproduce isotopic and elemental signatures of these grains, large-scale heterogeneous mixing in supernova ejecta is required. I investigate supernova mixtures that reproduce as many isotopic ratios as possible of 18 individual SiC X and 26 individual low-density graphite grains.
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