H+ (D+, T+)–beryllium collisions studied using time-dependent density functional theory

• H+(D+, T+)–Be collisions are investigated by time-dependent functional theory.
• A benchmark test is made for H+–He collision.
• The charge transfer and energy loss cross sections are obtained.

Charge transfer and energy loss cross section of the Be+X+Be+X+ (X=H, D and TX=H, D and T) collisions are calculated using time-dependent density functional theory (TDDFT). A detailed discussion on the reliability of our results is presented by a comparison to the well studied H+–He collision. Our calculations indicate that optimized effective potential improves the results significantly compared to conventional used adiabatic local density approximations. The isotope effect at low impact energies is well reproduced. The charge transfer and energy loss cross sections scale with the velocity of projectiles for energy larger than 5 keV. The results of quantum molecular dynamics and TDDFT are also compared in view of the charge transfer process.