Fermi Gas Model: Energetic Degeneration & the Pauli Exclusion Principle

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SUMMARY

The Fermi gas model incorporates the concept of energetic degeneration within a three-dimensional potential well, specifically addressing the indices "nx, ny, nz". The discussion highlights a discrepancy where multiple states can share the same energy level, leading to confusion regarding the Pauli exclusion principle, which limits the occupancy of identical fermions in a given state. It is clarified that the simplified representation of a one-dimensional potential well does not accurately reflect the complexities of a real nucleus, where treating the dimensions independently is inadequate.

PREREQUISITES
  • Understanding of the Fermi gas model
  • Familiarity with the Pauli exclusion principle
  • Knowledge of quantum mechanics and potential wells
  • Basic grasp of particle physics, specifically protons and neutrons
NEXT STEPS
  • Explore the implications of the Pauli exclusion principle in multi-particle systems
  • Study the differences between one-dimensional and three-dimensional potential wells
  • Investigate the concept of energetic degeneration in quantum systems
  • Learn about advanced models of nuclear structure beyond the Fermi gas model
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Students and researchers in quantum mechanics, particle physicists, and anyone studying nuclear structure and the Fermi gas model.

lukka98
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Potential-functions-used-in-the-Fermi-gas-model-of-the-nucleus-as-well-as-some-model_Q320.jpg

In the fermi gas model, there is assumption that there is a 3D potential well, but there is "energetic degeneration" for each three index "nx, ny, nz".
Now the problem is with that image, if there is degeration, for some level En there may be 10 distinctive state with same energy, so there is 20 proton and 20 neutron for Pauli exclusion in that state, why in the image there are only two particle for each state?

Is because is a 1D potential well, just for simplify?

thanks
 
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It's a very simplified sketch, and the real potential well is not a cube so treating x,y,z independently isn't working in a real nucleus.
 

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