How do the s-process and r-process create elements in stars?

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In summary, the conversation was about finding clear explanations and diagrams for understanding the s-process and r-process in stars, as well as examples of how neutron capture affects the elements in the periodic table. Various links were provided, including a paper by Cowan and Thielemann, the Wikipedia page on the s-process, and a chapter in Krane's textbook on nuclear astrophysics. The final comment expressed gratitude for the resources provided.
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Marty-0750
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Hi All

New here...

Where can I get clear explanations of how s-process and r-process works in stars. Diagrams and examples how neutron capture bumps elements up the period table. Which elements are created by either process.

Marty
 
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Related to How do the s-process and r-process create elements in stars?

1. What is the difference between the S-process and r-process?

The S-process (slow neutron-capture process) and r-process (rapid neutron-capture process) are two different nucleosynthesis processes that occur in stars. The S-process involves the capture of slow-moving neutrons onto stable nuclei, gradually building up heavier elements. The r-process, on the other hand, involves the capture of rapid-moving neutrons onto unstable nuclei, resulting in the production of heavy elements in a short period of time.

2. Which elements are primarily produced by the S-process and r-process?

The S-process is responsible for the production of elements with atomic numbers between 26 (iron) and 82 (lead), including elements such as silver, gold, and tin. The r-process, on the other hand, is responsible for the production of heavy elements with atomic numbers above 82, such as uranium and plutonium.

3. Where do the S-process and r-process occur?

The S-process primarily occurs in the late stages of low- to medium-mass stars, such as red giants. The r-process, on the other hand, occurs in extreme environments such as supernovae explosions or neutron star mergers.

4. How do we study the S-process and r-process?

We can study the S-process and r-process through astronomical observations and laboratory experiments. Astronomers study the chemical composition of stars and their surrounding environments to determine the abundance of elements produced by these processes. Laboratory experiments involve recreating the extreme conditions of stars to understand the nuclear reactions that occur during the S-process and r-process.

5. What is the significance of the S-process and r-process in understanding the evolution of the universe?

The S-process and r-process are crucial in understanding the chemical evolution of the universe. The production of heavy elements by these processes has a significant impact on the composition of stars, planets, and even life on Earth. By studying the abundance of elements produced by the S-process and r-process, we can gain insights into the formation and evolution of our universe.

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