Ion-pair production due to electron-impact dissociative ionization of sulfur hexafluoride molecule

摘要

Using the crossed molecular and electron beams technique and the mass-spectrometric analysis of the reaction products,electron-impact dissociative ionization of the sulfur hexafluoride (SF_6)molecule was studied within the incident electron energy range from threshold up to 150 eV.The simultaneous production of the ion fragment pair SF_3~+,F~+was observed confirming the mechanism of intermediate doubly charged SF_4~(2+)ion formation suggested earlier by several authors.The relative dissociative ionization cross sections were normalized to the absolute scale using known experimental data.