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Abstract It has been pointed out that it is possible to determine the ratio of the magnetic moment of the proton to that of the deuteron by comparing the rates of the ortho-para interconversion for hydrogen and deuterium which proceed in the presence of oxygen. The catalytic ortho-para-hydrogen-conversion induced by oxygen was discovered by L. Farkas and Sachsse, and is caused by the inhomogeneous magnetic Held of the para-magnetic oxygen molecule interacting during the collision with the nuclear magnets of the hydrogen molecule.
Farkas et al. (Tue,) studied this question.