Abstract

Negative ion formation as a result of the electron bombardment of silicon tetrafluoride and carbon tetrafluoride has been studied as a function of the electron energy. A vertical rise to maximum cross-section at threshold is a feature of the ionisation processes for several ions formed by silicon tetrafluoride. A value of ∼2.2 × 10 −10 molec −1cm 3sec −1 has been estimated for the rate constant of the reaction: ▪

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