My approach works as you can see in my paper "Electromagnetic Theory of the Binding Energy of the Hydrogen Isotopes"
http://www.springerlink.com/content/...tation/?MUD=MP
By the way, I found (more) errors in this paper.
1) You take a vague drawing of the "neutron" charge separation, and the proton charge, and compute an "electric quadrupole". You forgot to compute, also, the electric dipole moment---which is certainly nonzero, and very large (of order 10^-15 e*m) in your picture. This is important, because
no nucleus has ever shown a nonzero electric dipole moment in experiments sensitive to ~10^-29 e*m. Your model can only get to this level if there's absolutely perfect matching between your neutron's internal +/- separation, and the external separation between the neutron's - and the proton's +. If this is to be consistent with data, these two distances would have to be identical to a precision of 0.000000000000001%. (One part in 10^14, in case I miscounted my zeros)
2) You recognize that the neutron has no large permanent electric dipole moment. You suggest, in the text, that the dipole might be induced by a nearby charge. Now, induced dipoles are an idea from real-world physics, but
that's not the physics you used. All of your energy calculations are the calculations associated with a non-induced, large, static dipole. You did *not* include any polarization energy, nor indeed do you appear to be aware that this exists. You used a neutral object with a giant static dipole, an object which is obviously not a neutron.
3) You did force-calculations between the proton and the "-" half of the "neutron", which you put at a distance r_{np}. But then you put the neutron magnetic dipole
also at r_{np}. Shouldn't the magnetic dipole be associated with both halves of the "neutron", rather than perfectly co-located with the "-" half? Since this dipole is, you say, repelled from the proton, it would be (if anything) pushed more towards "+" side---i.e., much, much farther from the "proton" than you assumed.
4) You extend your model to other isotopes, saying "the magnetic moments of the neutron and the proton are collinear in the deuteron and perpendicular in the other isotopes." You don't bother analyzing why, or how, the magnetic moments might be "perpendicular"---you just plunk the particles down and pretend that they stay where you put them. For example, your picture of tritium is
unstable---it's not the ground state. The total energy will be lower if the central magnet is allowed to flip sideways. For another example, your "planar" drawing of 5H is nonsense---even assuming you know the spin directions and the force directions, which you don't, the ground-state configuration of this set of objects is a tetrahedron, not a flat square.
5)
You have your E&M equilibria entirely wrong. You chose to guess all of the spin directions, then calculate linear forces, and find an "equilibrium". Unfortunately, you forgot about torques. The state you identify is never the ground state; the energy would be lowered (continuously) by rotating the proton spin, making the magnetic force attractive, removing the hard-core you point out and making the proton "fall into" the negative end of the neutron. Why is this obvious? It's an instance of Earnshaw's Theorem, the general proof that electromagnetic forces in 3D
do not have stable static equilibria. Never. Look it up.