A Direct Determination of the Magnetic Moment of the Protons in Units of the Nuclear Magneton

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Abstract
A direct measurement of the proton magnetic moment in units of the nuclear magneton has been made, using the method of Alvarez and Bloch. The experiment consists of comparison of the nuclear magnetic resonance frequency of protons with the orbital frequency of protons revolving in the same homogeneous field. The resonance frequency of protons in water has been measured by the method of nuclear induction; the orbital frequency has been measured by a special device: a small decelerating cyclotron operated at an odd multiple of the fundamental cyclotron frequency.