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Fermi Gas Model / Fermi energy and momentum

  1. Jul 18, 2005 #1
    Hi,

    Hope somebody can help - I seem to be missing the obvious and bonking
    my head on the wall.

    In Wong and also in Feshbach/deShalit, they calculate the Fermi momentum,
    Kf using the experimental value of Rho-0 and come up with Kf=1.3 fm-1

    So far so good.

    Where I stumble is in their calculation of the Fermi Energy, Ef. For
    instance, Wong has Ef=(hbar*Kf)^2/2M, M=nucleon mass, giving
    Ef about 37 Mev. But when I plug in the appropriate values I get an
    Ef of 11.2 ish Mev with M = M neutron ~939.5 Mev/c^2.

    I'm sure I'm missing the obvious 'adjustment' to the privously
    calculated Kf, and suspect it is a geometrical consideration as I'm
    off roughly pi.

    Thanks

    Mike
     
  2. jcsd
  3. Jul 24, 2005 #2
    er..ah.. stupid math error

    multiplying by 1.xx ^ +15 and dividing by 1.xx ^ -15 give answers to same order of magnitude...just that one is 11.7 and the other is 37 :bugeye: I've been wearing my dunce hat for a few days now!
     
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