The single-electron charge-transfer process in ${\mathrm{H}}^{+}-{\mathrm{H}}_2$ collisions is investigated using a fully correlated two-active-electron semiclassical atomic-orbital close-coupling method in the energy range of 0.1–100 keV/u, and the orientation and vibrational effects of the molecular target are taken into account under the sudden approximation. Total and state-selective charge-exchange cross sections for this system are provided, and excellent agreement is found between our calculations and the available experimental data for total charge-transfer cross sections in the energy range of 0.2–100 keV/u. The vibrational effect from the molecular target make a big contribution to the total charge–transfer cross sections for energies below 2 keV/u, and it leads to an increase of 8%–185% for the total charge-exchange cross sections in the 0.1–1 keV/u range. Furthermore, absolute angular differential cross sections at different energies are reported, and their oscillatory structures are inferred to originate from Fraunhofer-type diffraction.

Close

PrevNext

View figure in article

• Atomic & molecular collisions
• Vibronic effects