[AntonioLao]

In 1927 the German physicists Walter Heitler and Fritz London used a quantum-mechanical idea 1st described by Heisenberg in 1926: the idea of symmetric and antisymmetric wave functions. It was 2applied to derive approximately the wave function of 2 interacting hydrogen atoms in forming H2 molecules. The fact is that these atoms only attract if their electrons are of opposite spins otherwise repel. In 1935 Linus Pauling and E. Bright Wilson, Jr. published the complete wave function, which also proved proton spins and the existence of para and ortho hydrogen molecules with statistical spectroscopic analysis that ordinary hydrogen is ¼ para and ¾ ortho hydrogens. Para hydrogen molecule has opposite nuclear spins existing in even rotational state, while ortho species have parallel nuclear spins existing in odd rotational states. These discoveries by 1 prominent and 3 lesser known scientists (Pauling received 2 Nobel Prizes: chemistry-1954 and peace-1962) gave strong indications that controlled thermonuclear fusion research need serious considerations the proton-proton attraction at Fermi length, hence taking advantage of the limited effectiveness of the most powerful force in nature: the strong nuclear colored gluon force.