Nucleosynthesis

Definition

Nucleosynthesis is the process by which new atomic nuclei are created from existing protons and neutrons. This occurs primarily in the cores of stars through nuclear fusion reactions.

5 Must Know Facts For Your Next Test

1. Nucleosynthesis in massive stars primarily occurs during their main sequence and supernova stages.
2. Elements heavier than hydrogen and helium, up to iron, are formed through stellar nucleosynthesis.
3. Supernova nucleosynthesis is responsible for creating elements heavier than iron.
4. The process of nucleosynthesis releases a significant amount of energy, contributing to a star's luminosity.
5. Helium burning in more massive stars leads to the creation of carbon and oxygen.

Review Questions

• What role does nucleosynthesis play in the life cycle of a star?
• How are elements heavier than iron formed during the evolution of massive stars?
• Why is supernova nucleosynthesis crucial for the creation of heavy elements?

Related terms

Stellar Nucleosynthesis:

The creation of chemical elements within stars through nuclear fusion reactions.

Supernova Nucleosynthesis:

The formation of heavy elements beyond iron during the explosive death of a massive star.

Nuclear Fusion:

A reaction where light atomic nuclei combine to form a heavier nucleus, releasing energy in the process.