Why Did Neutrons Decay in the Early Universe?

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SUMMARY

In the early universe, the combination of electrons and protons led to the formation of neutrons, with few protons remaining. The statement that neutrons inside specific nuclei would decay is true if the mass difference exceeds the binding energy of that nucleus. Neutrons will beta decay if their lifetime is shorter than the age of the universe, which is not the case for all nuclei. This understanding is crucial for comprehending nucleosynthesis in the early universe.

PREREQUISITES
  • Understanding of nuclear binding energy
  • Familiarity with beta decay processes
  • Knowledge of nucleosynthesis
  • Basic concepts of particle physics
NEXT STEPS
  • Research nuclear binding energy calculations for specific isotopes
  • Study beta decay mechanisms and their implications
  • Explore the process of nucleosynthesis in the early universe
  • Investigate the lifetime of various nuclei in relation to cosmic timescales
USEFUL FOR

Physicists, astrophysicists, and students studying cosmology or nuclear physics who are interested in the processes that shaped the early universe.

bobsmith76
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In the
early universe electrons and protons would combine to form neutrons and few, if
any, protons would remain. If the mass difference were greater than the binding
energies of nuclei, neutrons inside nuclei would decay leaving no nuclei behind.


Does anyone know why the above statement is true?
 
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If the mass difference were greater than the binding
energy of A SPECIFIC NUCLEUS, neutrons inside THAT NUCLEUS would BETA decay leaving no nuclei OF THAT SPECIFIC TYPE behind, unless its lifetime were longer than the age of the universe.
If that were true for ALL nuclei, I woud not be typing this.

If that
 

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