Collisions of kilo-electron-volt H⁺ and He⁺ with molecules at small angles: Absolute differential cross sections for charge transfer

R. S. Gao, L. K. Johnson, C. L. Hakes, K. A. Smith, and R. F. Stebbings

Phys. Rev. A 41, 5929 (1990)

Absolute differential cross sections for charge-transfer scattering of H⁺ and He⁺ from molecules are reported over the laboratory angular range 0.02°­1.0°. Cross sections have been determined at 0.5, 1.5, and 5.0 keV for collisions of H⁺ with N₂ and O₂, and at 1.5 keV for collisions of H⁺ with CO, CO₂, NO, and CH₄, and of He⁺ with H₂, N₂, O₂, CO, and NO. The data exhibit considerable structure over the experimental angular range. Absolute integral cross sections from 0° to 1.0° have been obtained and are compared with the published total cross sections.