The Measurement ofeMby Cyclotron Resonance

Abstract

The cyclotron resonance frequency of the proton has been measured using a new method. By measuring the spin precessional frequency of the proton in the same magnetic field, the proton magnetic moment in nuclear magnetons has been determined as ${\mu }_p=2.79276\mathrm{}\pm 0.00006$. In combination with other data this result can be used directly to determine the charge-to-mass ratio of the proton $\frac{e}{M_p}={9579.4}_2\pm 0.3$ emu/g, the faraday $F={9652.0}_3\pm 0.3$ emu/g (physical scale), and the ratio of the proton mass to the electron mass $\frac{M_p}{m_e}=1836.12\mathrm{}\pm 0.05$. A preliminary value for the ${\mathrm{H}}_2$-D doublet is given.