International Symposium on Nuclei in the Cosmos XVIII (NIC XVIII)

Origin of Rare Isotopes in Presolar Grains as the Probe of Neutrino Mass Hierarchy and Supernova Nucleosynthesis

17 Jun 2025, 11:45

15m

Girona

Contributed Talk Stellar Abundances II – Presolar Grains

Speaker

Dr Yudong Luo (Peking University)

Description

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 calcium-aluminum inclusions (CAIs) can be quantitatively explained by CCSN models with weak s-process, suggesting that CCSNe contributed to the early solar system's material. Our results indicate that isotopic abundance analysis in CAIs and presolar grains is crucial for understanding the origins of these rare isotopes.

[1] Y. Luo, T. Kajino, T. Hayakawa and Tsuyoshi Iizuka (2025), to be published.
[2] X. Yao, T. Kajino, Y. Luo, et al., Astrophys. J. 980 (2025), 247 (21pp).
[3] X. Yao, Y. Luo, T. Kajino, et al., Chinese Phys. C (2025), submitted.