Systematic Study of Electron and Positron Collisions with Perfluorocarbons C4F8, cyclo-C4F8 and C4F10
Total cross section (TCS) measurements for 0.4–1000eV electron and 0.2–1000eV positron collisions have been studied for C4F8, cyclo-C4F8 and C4F10 molecules in a linear time-of-flight apparatus. Electron TCSs for all molecules show strong enhancements, which may be due to the temporary-negative-ion resonances observed in another systematic study of perfluorocarbons by Sanabia et al. Positron TCSs, on the other hand, show no conspicuous structures but have TCS magnitudes that increase with increase in molecular size.
KeywordsTotal Cross Section Ionisation Cross Section Electron Attachment Positron Impact Partial Ionisation Cross Section
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