Absolute differential and total cross sections for direct and charge-transfer scattering of keV protons byO2

Calculated and experimental differential direct, charge-transfer, and total scattering cross sections are presented for collisions of H⁺ with O₂. Experimental cross sections are obtained for projectile energies of 0.5, 1.5, and 5.00.3em0exkeV, and scattering angles of 0.15^∘{} to 5^∘{} while the theoretical results extend from 0.50.5em0exto0.5em0ex250.3em0exkeV and encompass scattering angles from 0.01^∘{} to 180^∘{}. We find good agreement between the calculated and measured differential and total cross sections. Also, a diffraction slit effect, which is target orientation dependent, is found in the differential scattering cross section. A theoretical explanation of the effect is presented.