Cross Sections for Positive-Ion and Electron Production in Collisions of 1-25 keV Hydrogen Atoms with Atomic and Molecular Gases

Abstract

Cross sections are reported for production of positive ions and electrons in collisions of hydrogen atoms in the energy range 1-25 keV with He, Ne, A, Kr, Xe, ${\mathrm{H}}_2$, and ${\mathrm{O}}_2$. Slow positive ions are produced by capture of an electron by the fast atom from the target gas and by ionization of the target. Electrons are produced by target-gas ionization and by stripping of the fast atom. Ionization cross sections for each of the target gases are derived from the positive-ion production cross sections and previous measurements of the capture cross sections.