International Journal of Mass Spectrometry and Ion Processes
Variable-temperature selected ion flow tube studies of the reactions of Ar+, Ar+2 and ArH+n (n = 1-3) ions wi H2, HD and D2 at 300 K and 80 K
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2015, Spectrochimica Acta - Part B Atomic SpectroscopyCitation Excerpt :Since most Ar+ ions react with H2 within the first few collisions and the kinetic energy loss by unreactive collision is small for light H2 gas, the kinetic energy with which Ar+ reacts is approximated by its initial kinetic energy, and hence the reaction cross section at that energy can be applied to the reactions at any position in the cell, and at any H2 density (H2 flow rate). This should be also the case with other reactant ions that have high reactivity toward H2, e.g. Ar2+, ArH+ [24] and ArO+ [25]. As an example, theoretically reviewed in this section is 40Ar+ interference on 40Ca+, which was reported to be reduced by H2 gas to an extent of a single ppt level of BEC for calcium in non-matrix samples [26].
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