Principle of Universality of γ-Process Nucleosynthesis in Core-Collapse Supernova Explosions
Abstract
Using core-collapse supernova explosion models, we investigate the principle of the universality of the γ-process, according to which the s/p abundance ratios produced by individual nucleosynthesis episode are almost constant over a wide range of atomic number. The universality originates from the shift of the γ-process layers, the independence of the s/p abundance ratios of the nuclear reactions, and the weak s-process in presupernovae. Our calculations further suggest an extended universality in which the s/p ratios in the γ-process layers are not only constant but also centered around a specific value of 3. To verify this, we propose an astronomical observation of indium isotopic abundance fractions.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 2006
- DOI:
- 10.1086/507703
- Bibcode:
- 2006ApJ...648L..47H
- Keywords:
-
- Nuclear Reactions;
- Nucleosynthesis;
- Abundances;
- Stars: Supernovae: General