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A Nuclear and Atomic energy levels

  1. Sep 13, 2018 #1
    I've noticed that in the Shell Model of the nucleus, the order of the energy levels is 1s, 1p3/2, 1p1/2, etc. While in the atomic energy levels it goes 1S 2S 2P, ... But they still take the same amount of particles for each level in both the atomic and nucleus.

    Am I missing something here? Or why does this happen? I mean, their order being different, but all of the rest is the same just changing electrons with nucleons
  2. jcsd
  3. Sep 13, 2018 #2


    Staff: Mentor

    The nuclear potential is not an 1/r2 potential and it is created by the nucleons occupying it. That makes the energy levels more complicated. The number of particles that can occupy a given energy level depends on the quantum numbers only, if you compare matching quantum numbers you get the same number of particles that fit in.
  4. Sep 16, 2018 #3


    User Avatar
    Science Advisor
    Gold Member

    The important point is the spin-orbit term, giving the "magic numbers" of nuclei. For that Jensen and Goeppert-Mayer earnt their Nobel.
  5. Sep 20, 2018 #4
    They take the same amount of particles for each level because they are fermions and must obey the Pauli exclusion principle.
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