Abstract
The methods of measuring the atomic masses of stable isotopes with high-resolution static and dynamic mass spectrometers are examined. The typical measurement errors characteristic of both classes of devices are indicated. The greatest difficulty arising in such experiments is taking account of the effect of stray electric fields on the parameters of the motion of two types of ions forming a mass doublet as well as determining and introducing corrections for the corresponding errors in the measured mass values. This effect could be especially important in measurements of wide mass doublets. A method similar to the one employed in direct measurements of the magnetic moment of the proton in terms of nuclear magnetons with a magnetic resonance mass spectrometer with a two-section ion source is suggested for taking into account the effect of the stray electric fields in atomic mass measurements.
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