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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