Dissociative Charge Exchange of Rarehyphen;Gas Ions with C2F6and C3F8

摘要

Dissociative charge exchange of rarehyphen;gas ions with C2F6and C3F8has been studied. The data was obtained with a singlehyphen;stage Nuclide mass spectrometer by operating the ion source in the Ccaron;ermaacute;kmdash;Herman mode. A chargehyphen;transfer mass spectrum was obtained for C2F6and C3F8with each rarehyphen;gas ion except Xe. The relative ionic abundances were interpreted as portraying the dissociation of C2F6+and C3F8+as a function of their excitation energy. The normalized abundance of CF8+as a funetion of excitation energy shows two maxima which indicates that two processes contribute to CF3+formation from C2F6and C3F8.