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ALPHA-CONSTRAINED QSE NUCLEOSYNTHESIS IN HIGH-ENTROPY AND FAST-EXPANDING MATERIAL
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ABSTRACT
We investigate the nucleosynthesis process in high-entropy (
) and very fast expanding (
) materials. In such a material with the electron fraction near 0.5, an interesting nucleosynthesis process occurs. In this process, the abundance distribution of heavy nuclei of
achieves quasi-statistical equilibrium (QSE) at high temperature and the abundances are frozen at the end of the nucleosynthesis. We explain this abundance distribution using the “alpha-constrained QSE” abundances formulated in this paper. We demonstrate that this nucleosynthesis would occur in neutrino-driven winds from massive proto-neutron stars in hypernovae, where
p-nuclei are synthesized.
American Astronomical Society
Title: ALPHA-CONSTRAINED QSE NUCLEOSYNTHESIS IN HIGH-ENTROPY AND FAST-EXPANDING MATERIAL
Description:
ABSTRACT
We investigate the nucleosynthesis process in high-entropy (
) and very fast expanding (
) materials.
In such a material with the electron fraction near 0.
5, an interesting nucleosynthesis process occurs.
In this process, the abundance distribution of heavy nuclei of
achieves quasi-statistical equilibrium (QSE) at high temperature and the abundances are frozen at the end of the nucleosynthesis.
We explain this abundance distribution using the “alpha-constrained QSE” abundances formulated in this paper.
We demonstrate that this nucleosynthesis would occur in neutrino-driven winds from massive proto-neutron stars in hypernovae, where
p-nuclei are synthesized.
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