Stellar Evolution: Main Sequence to Red Giant Stars
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Questions and Answers

What is the primary difference between the r-process and the p-process in nucleosynthesis?

  • The r-process involves rapid neutron capture, while the p-process involves proton capture. (correct)
  • The r-process always results in stable nuclei, while the p-process results in radioactive nuclei.
  • The r-process occurs in supernovae, while the p-process occurs in white dwarfs.
  • The r-process produces heavier isotopes of elements, while the p-process produces lighter isotopes.

    • Which process allows for the creation of heavier nuclei beyond iron in stellar nucleosynthesis?

  • Neutron capture (correct)
  • Proton capture
  • Beta decay
  • Alpha decay

    • What is the main challenge faced during proton capture or p-process, making it usually not favorable?

  • Insufficient energy available for the process
  • High temperatures causing instability
  • Strong Coulombic repulsion between protons (correct)
  • Excessive neutron bombardment

    • How does beta decay contribute to the formation of heavier nuclei?

    <p>By increasing the number of protons</p> Signup and view all the answers

    Which type of decay is essential in creating heavier isotopes through nucleosynthesis?

    <p>Beta decay</p> Signup and view all the answers

    Why can fusion reactions in stellar nucleosynthesis not produce nuclei higher than iron?

    <p>Because heavier nuclei require neutron or proton capture processes</p> Signup and view all the answers

    Which phenomenon results in the formation of a heavier nucleus different from its seed nucleus in neutron capture?

    <p>Beta decay</p> Signup and view all the answers

    What role do high temperatures play in the r-process of nucleosynthesis?

    <p>Speed up neutron movement for rapid capture</p> Signup and view all the answers

    Why is neutron capture categorized as either slow or rapid?

    <p>Dependent on the speed of neutron addition to nuclei</p> Signup and view all the answers

    What is the primary outcome of proton capture or p-process following a supernova event?

    <p>Production of radioactive elements</p> Signup and view all the answers

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