Abstract

It is shown that theoretical values of the mobility of atomic ions in gases can be used to calibrate a drift-tube mass spectrometer, leading to subsequent measurements that are accurate to 0.6% for He+ in He near room temperature as the ratio of the electrostatic field strength to the gas number density ranges up to 2 × 10−19 Vm2. Values of the ratio of the parallel diffusion coefficient to the mobility are also obtained.

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