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Evidence for two independent chemi-ionization processes in the O+C2H2 reaction

✍ Scribed by David E. Phippen; Kyle D. Bayes

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
355 KB
Volume
164
Category
Article
ISSN
0009-2614

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✦ Synopsis

Gases which are known to react rapidly with CH (X 'II) are added to low pressure mixtures of oxygen atoms and acetylene while monitoring chemi-ion formation. Addition of CH, and N,O, which do not react with oxygen atoms at room temperature, rapidly quench part of the chemi-ion formation, but further additions do not quench it completely. The data can be tit to a simple kinetic model that assumes two independent chemi-ionization reactions. Mass analysis shows that HCO+ is the primary ion for both processes. We propose that the non-quenchable chemi-ionization is caused by the reaction of oxygen atoms with the metastable CH (a "Z )

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