Principle of Universality of γ-Process Nucleosynthesis in Core-Collapse Supernova Explosions

Details Principle of Universality of γ-Process Nucleosynthesis in Core-Collapse Supernova Explosions Principle of Universality of γ-Process Nucleosynthesis in Core-Collapse Supernova Explosions

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...648l..47h&link_type=abstract

The Astrophysical Journal, Volume 648, Issue 1, pp. L47-L50.

Astronomy and Astrophysics

Astronomy

10

Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Supernovae: General

Scientific paper

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.

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