Mobilities and Reactions of Ions in Argon

Abstract

The development of an ion-drift cell using mass analysis has enabled the measurement of mobility and identification of six ions in argon. Reduced mobilities of 1.40, 1.95, and 2.40 have been obtained for Ar + , Ar 2 + , and Ar + + in the pure gas, allowing positive identification of ions observed in early experiments by Hornbeck, Biondi, and Beaty. Also, mobilities are obtained for H 3 + , ArH + , and Kr + formed in mixtures of argon with hydrogen and krypton. To determine mobilities in argon, three separate experiments using (1) a conventional parallel-plate ion-drift tube, (2) a modified pulsed Townsend discharge with mass analysis, and (3) a gated Tyndall technique with mass analysis were performed to permit comparison with previous experiments.

Electron Temperature Dependence of the Dissociative Recombination Coefficient of Molecular Argon Ions Ar+2 with Electrons

“…This value is in reasonable agreement with those measured by other authors (Bhattacharya and Ingold [18], Smith et al [19], Armour [20], Biondi and Chanin [21], Hornbeck [22], Courville and Biondi [23], Beaty [24,25], McAfee et al [26], Bhattacharya [27]). From Fig.…”

Measuring the mobilities of the ions formed in P-10 mixtures

“…In the absence of charge exchange effects and ion or atom exchange or interchange upon collision, the Langevin polarization limit, represents a limit for k 0 [6]. According to the Langevin's theory, published in 1905 [7], the limiting value of the mobility is reached when the repulsion cross section becomes negligible compared with the polarization effect.…”

Ion Mobility‐Mass Spectrometry

“…Early studies of small gas-phase ions and molecules also applied corona ion discharge (19,64) and radioactive ion sources. (65) Laser desorption ionization is useful for the ionization of solid samples and has been demonstrated on carbon clusters, silicon clusters, and fullerenes.…”

“…McAfee et al (19) constructed the first IMS-TOF-MS in 1967 to study the mobilities and reactions of small ions in the presence of argon gas. IMS is an excellent match for TOF-MS analyzers owing to the timescales of each technique.…”