Fluorine Auger-electron production in collisions of H⁺ and Li²⁺ with fluorocarbon targets

Relative and absolute cross sections are presented for fluorine KLL Auger-electron production in collisions of 2.0-MeV H⁺ and 0.5-MeV/amu Li²⁺ with various fluorocarbon targets. Auger yields were measured for molecular targets of CH₃F, CH₂F₂, C₂H₂F₂, CHF₃, CF₄, C₂F₆, and C₄F₈. The fluorine Auger cross sections for these collision systems were found to be independent of the chemical environment, i.e., the atomic cross sections were found to obey additivity for these molecules. This is in contrast to recently reported fluorine K-shell ionization cross sections found for He⁺ impact on fluorocarbon targets, where the atomic cross sections were found to differ by up to a factor of 3.