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Stellar Evolution: Main Sequence to Red Giant Stars

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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?

By increasing the number of protons Signup and view all the answers

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

Beta decay Signup and view all the answers

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

Because heavier nuclei require neutron or proton capture processes Signup and view all the answers

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

Beta decay Signup and view all the answers

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

Speed up neutron movement for rapid capture Signup and view all the answers

Why is neutron capture categorized as either slow or rapid?

Dependent on the speed of neutron addition to nuclei Signup and view all the answers

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

Production of radioactive elements Signup and view all the answers