High-Pressure Photoionization Reactions of

Sieck et have recently developed an apparatus for the study of thermal ion-molecule reactions initiated by photoionization in a reaction chamber at pressures in the range 0-20 Torr. The reaction chamber has LiF windows 

TABLE II. Comparison of Some Rate Constants Measured by Warneck s Pulse Photoionization Technique with Those Measured 

The advantages of the photoionization technique are nicely illustrated in their study of the (nominally) charge-transfer reaction 

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