High kinetic energy N+ ions from decay of doubly ionized N2

Abstract

N⁺ ions from the process e+N₂→N₂²⁺+3e→N⁺ +N⁺+3e have been searched for by a coincidence method in which N⁺ ions were detected at 90° to crossed N₂ and pulsed electron beams. Measurements were made for incident electron beam energies of 100, 150, and 300 eV. At electron energies of 150 and 300 eV, a comparison of calculated accidental and measured coincidence time‐of‐flight distributions indicates the presence of N⁺ ions with kinetic energies in the region from 5 to 14 eV from the double ionization process above.