The mobilities of xenon ions in xenon and the derived charge transfer cross section for Xe+(2P3/2) ions in xenon

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Abstract
A drift tube of the four-gauze Tyndall-Powell type has been used to obtain accurate mobility data for ground-state Xe+(2P3/2) ions, metastable Xe+(2P1/2) ions and molecular Xe2+/Xe3+ ions in xenon at room temperature (294.1+or-0.2K) over a wide E/N range (E is the electric field strength and N is the gas number density). The measurements were made at E/N values from 50 to 10000 Td in the case of the Xe+(2P3/2) ions, and from 50 to 250 Td in the case of the Xe2+/Xe3+ ions. The mobility data for the Xe+(2P1/2) ions were derived by a manual deconvolution of the Xe+(2P3/2)+Xe+(2P1/2) peak into two Gaussian curves. Owing to low resolution, the data for the Xe+(2P1/2) ions could only be derived for E/N values less than 900 Td. The mobility of the Xe+(2P3/2) ions was found, over the common E/N range, to be systematically 6% lower than that of the Xe+(2P1/2) ions. The charge transfer cross section sigma c, calculated for Xe+(2P32/) ions in xenon over the energy range 0.38 to 4.46 eV (lab) using the theory of Skullerud (1969), is estimated to be in error by less than +or-5%.

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