Deuterium

Quote:

"Deuterium, however, benefits from having its proton and neutron coupled to a spin-1 state, which gives a stronger nuclear attraction; the corresponding spin-1 state does not exist in the two-neutron or two-proton system, due to the Pauli exclusion principle which would require one or the other identical particle with the same spin to have some other different quantum number, such as orbital angular momentum. But orbital angular momentum of either particle gives a lower binding energy for the system, primarily due to increasing distance of the particles in the steep gradient of the nuclear force. In both cases, this causes the diproton and dineutron nucleus to be unstable."

https://en.m.wikipedia.org/wiki/Deuterium


Comment:
With the ornac-pair and axis the stability of the deuteron can be explained directly. There is no need for the Pauli exclusion principle to show that p-p or n-n are unfeasible.

Quote:
"Deuterium is one of only five stable nuclides with an odd number of protons and an odd number of neutrons. (2
H
, 6
Li
, 10
B
, 14
N
, 180m
Ta
; also, the long-lived radioactive nuclides 40
K
, 50
V
, 138
La
, 176
Lu
occur naturally.) Most odd-odd nuclei are unstable with respect to beta decay, because the decay products are even-even, and are therefore more strongly bound, due to nuclear pairing effects."


Q Quote:
"The measured value of the deuterium magnetic dipole moment, is 0.857 µ
N, which is 97.5% of the 0.879 µ
N value obtained by simply adding moments of the proton and neutron. This suggests that the state of the deuterium is indeed to a good approximation s = 1, l = 0 state, which occurs with both nucleons spinning in the same direction, but their magnetic moments subtracting because of the neutron's negative moment."


Comment:
The difference between the simply adding and measured can be used to calculate the distance between the nucleids.
The 2.5% , which is lacking is used for the magnetic field, that emerges between the two nucleids, which have opposing poles.