Direct Determination of Ion-Neutral Molecule Interaction Potentials from Gaseous Ion Mobility Measurements.

摘要

In the last fifteen years it has become possible to make measurements of the mobility of trace amounts of ions through a neutral gas with an accuracy of 1-2% over a wide range of E/N, the ratio of electric field strength to the neutral gas number density. Only recently, however, has theory developed sufficiently to permit to obtain accurate information about ion-neutral potentials from analysis of such measurements. We present a scheme that allows the theoretical expressions to be inverted, so that the direct determination of ion-neutral potentials from gaseous ion mobility measurements becomes feasible with good accuracy (5% or better) over a wide range of separation distances. The accuracy of the inversion scheme is tested using simulated data for Li(+)in He. (Author)