Relative sensitivity factors in glow discharge mass spectrometry: the role of charge transfer ionization

Numerical Modeling of Analytical Glow Discharges

“…Calculations have mainly been performed for dc glow discharges, under both GDMS and GD-OES (Grimm-type) conditions; therefore, most results presented below apply to dc glow discharges. Nevertheless, Emission spectra and emission spatial distributions due to radiative decay from the excited levels (for argon and cathode atoms + ions) [39,43,[63][64][65] Data from the literature [66][67][68] Effect of cell geometry on the calculated quantities [56,57] -Prediction of variations in relative sensitivity factors for GDMS [69] Data from the literature [17] calculations have also been carried out for rf and microsecond-pulsed discharges, and some of these results will also be discussed below.…”

“…This illustrates that the models can in principle be applied to predict the effect of cell geometry, as a help for the design of new cells. [66] 6.3.9 PREDICTION OF RELATIVE SENSITIVITY FACTORS IN GDMS Finally, as a spin-off, we have used our models to explain experimentally observed differences in relative sensitivity factors (RSFs) in GDMS [69]. Since the crosssections of asymmetric charge transfer ionization of different elements are not available in the literature, a model was developed for calculating RSFs based on transport and Penning ionization only, since electron impact ionization is of minor importance (see above), to test the influence of asymmetric charge transfer.…”

“…This strongly suggests that, in addition to transport and Penning ionization, especially the occurrence or nonoccurrence of asymmetric charge transfer can explain the differences in RSFs among different elements. More information about this investigation can be found elsewhere [69].…”

Transition rates and transition rate diagrams in atomic emission spectroscopy: A review

“…Besides the Grimm-type discharge [42][43][44], ACT reactions are important e.g. in hollow cathode discharges [45], in glow discharge mass spectrometry [46,47], in metal ion lasers [48,49] and other areas. Considerable efforts have been made to determine rate coefficients and cross-sections of the ACT reactions experimentally [50,51] and by calculations [52][53][54].…”

A selected ion flow tube study of the reactions of gas-phase cations with PSCl3

“…A better understanding of the mechanism of charge transfer, vital to plasma modelling [1], can be obtained from ion-molecule reaction studies. Chlorinated molecules are widely used in plasma etching processes, and in this paper we present data on the reactions of a number of small gas-phase cations with thiophosphoryl chloride, PSCl 3 .…”