Presolar grains, submicron- to micron-sized meteoritic particles, originate from stellar winds and the ejecta of stellar explosions, providing direct samples of stellar material. Among these, silicon carbide (SiC) grains are particularly well-studied. Multielement isotope analyses of presolar SiC grains have firmly linked their origins to asymptotic giant branch (AGB) stars and core-collapse...
The isotopic compositions of Zr, Mo, Ru, and Ba in presolar SiC have much to tell us about nucleosynthesis in stars, particularly asymptotic giant branch (AGB) stars, the likely sources of mainstream as well as types Y and Z presolar SiC grains. We highlight here two examples from recent simultaneous measurements on multiple elements in single presolar grains. (1) From their Mo and Ru isotopic...
Here we present our study on isotopic ratios of several typical neutrino-process nuclides in core-collapse supernova. We find that the measurement of isotopic ratios like 11B/10B with 138La/139La or 6Li/7Li can constrain neutrino mass hierarchy, providing new probes for understanding CCSN nucleosynthesis. Additionally, we show that the correlation between 138La/139La and 50Ti/48Ti in...
