Abstract
An exact method is given to decouple the coupling between gas-phase ion cyclotron motion and ion rotation, which are coupled via Coriolis interaction. Applying the minimized wave packet for near-classically behaving ions in ICR cells, a small shift of 10 −6 of the ion resonance frequency induced by ion rotation is predicted. The shifts are proportional to the ratio of rotational orbit velocity to circular cyclotron drift velocity and inversely proportional to the ratio of thermal energy to cyclotron transition energy. With the aid of the expression for small shifts of the ion resonance frequency, one may consider the development of a high-resolution ICR spectrometer.
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