New Results on Nucleosynthesis in Massive Stars; Nuclear Data Needs for Nucleosynthesis
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چکیده
منابع مشابه
New Results on Nucleosynthesis in Massive Stars; Nuclear Data Needs for Nucleosynthesis
We review the current status of the nuclear reaction rates needed to study nucleosynthesis in massive stars. Results for the calculated nucleosynthesis of all stable species from Hydrogen to Bismuth in a completely evolved 25 M star of initial solar metallicity will be presented. Special emphasis will be paid to two particular reactions, C( ) O and Ne( ) Mg, and their effect on the structure of...
متن کاملNuclear Aspects of Nucleosynthesis in Massive Stars
Nuclear reactions play a major role not only in the nucleosynthetic processes determining the elemental abundances in the solar system and the Galaxy but also for determining structure and final fate of a star. Massive stars (> 8M⊙) experience a number of burning phases before they explode as type II supernovae after the collapse of the Fe core. Important nuclear reactions in the late burning s...
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We have performed the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in a finely-zoned stellar model computed from the onset of central hydrogen burning through explosion as a Type II supernova. Calculations were done for 15 M⊙, 20 M⊙, and 25 M⊙ Pop I stars using the most recently available set of experimental and theoretical nuclear data, revi...
متن کاملEvolution and Nucleosynthesis of Massive Stars and Related Nuclear Uncertainties
Properties of atomic nuclei important for the prediction of astrophysical reaction rates are reviewed. In the first part, a recent simulation of evolution and nucleosynthesis of stars between 15 and 25 M⊙ is presented. This study is used to illustrate the required nuclear input as well as to give examples of the sensitivity to certain rates. The second part focusses on the prediction of nuclear...
متن کاملA New Study of s-Process Nucleosynthesis in Massive Stars
We present a comprehensive study of s-process nucleosynthesis in 15, 20, 25, and 30 M stellar models having solar-like initial composition. The stars are evolved up to ignition of central neon with a 659 species network coupled to the stellar models. In this way, the initial composition from one burning phase to another is consistently determined, especially with respect to neutron capture reac...
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ژورنال
عنوان ژورنال: Journal of Nuclear Science and Technology
سال: 2002
ISSN: 0022-3131,1881-1248
DOI: 10.1080/00223131.2002.10875153