Questions to do with how new atomic nuclei are created inside the universe.
Questions about nucleosynthesis may encompass at least one of the following:
- Stellar nucleosynthesis
- Supernova nucleosynthesis
- Cosmic ray spallation
- Big bang nucleosynthesis
Questions tagged [nucleosynthesis]
61 questions
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1 answer
What effects besides "mass defect" cause the alpha ladder beyond iron-56/nickel-56 to be endothermic?
Many sources state that fusion beyond iron-56/nickel-56 (and certainly beyond nickel-62) is impossible due to them being among the most tightly bound nuclei. For example, in the Wikipedia article on the iron peak…
HeatherB
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Photodisintegration vs Spallation
Is photodisintegration belongs to a form of spallation? Is photodisintegration only limited to nucleus hit by high energy gamma-ray, whereas the nucleus in spallation can be hit by any high energy particles?
Jack the Ranger
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Why alpha-process cannot work beyond iron?
In the book The Synthesis of Elements by Giora Shaviv (Springer, 2012) on page 383 is the following set of reactions and statement about alpha-process:
"The process cannot go beyond iron because, as can be seen from the energies of the reactions,…
Leos Ondra
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How did the amount of nuclide produced by s- and r-process changed over time?
For a exercise I need to find out how the amount of nuclide produced by s- and r-process changed over time and I also need to draw a schematic diagram of the s-/r-ratio vs. time from 13.6 Ga till today and explain my reasoning. I searched for an…
