Absolute differential and total cross sections for direct and charge-transfer scattering of keV protons by ${\mathrm{O}}_{2}$

Absolute differential and total cross sections for direct and charge-transfer scattering of keV protons by $O_{2}$

R. Cabrera-Trujillo, Y. Öhrn, E. Deumens, J. R. Sabin, and B. G. Lindsay

Phys. Rev. A 70, 042705 – Published 12 October 2004

Abstract

Calculated and experimental differential direct, charge-transfer, and total scattering cross sections are presented for collisions of $H^{+}$ with $O_{2}$ . Experimental cross sections are obtained for projectile energies of 0.5, 1.5, and $5.0 keV$ , and scattering angles of 0.15° to 5° while the theoretical results extend from $0.5 to 25 keV$ 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.