Recoil Ions from Close 20-keV H⁺ Collisions with O₂, CO, CO₂, and Ne

Authors

Akio Itoh, University of Nebraska - Lincoln
M. Eugene Rudd, University of Nebraska - LincolnFollow

Date of this Version

2-15-1987

Comments

Published in Physical Review A Volume 35, Number 4, February 15, 1987. Copyright © American Physical Society; used by permission.

Abstract

Recoil ions ejected at 70° from 20-keV proton collisions with O₂, CO, CO₂, and Ne were analyzed by an electrostatic analyzer. For the molecular targets, only singly ionized ions of oxygen or carbon were detected while in the spectrum of neon ions, Ne⁺ and Ne²⁺ were both observed. The absence of O₂⁺, CO⁺, and CO₂⁺ is due to the fact that the recoil ions detected in this experiment result only from very close collisions with one of the atoms in the molecule resulting in dissociation. A possible explanation for the absence of O²⁺ and C²⁺ peaks based on the molecular nature of the targets is proposed.