Charge transfer mechanism in N⁴⁺ + He and B³⁺ + He/H₂ ion–atom/molecule collisions

Abstract

Ab initio potential energy curves and coupling matrix elements of the molecular states involved in the collision of the N 4ϩ (2s) 2 S and B 3ϩ (1s 2 ) 1 S multicharged ions on the helium atom or molecular hydrogen have been determined by means of configuration interaction methods. The total and partial electron capture cross-sections have been evaluated in the frame of a semiclassic approach in the 1-to 100-keV laboratory energy range and compared to experimental data. A comparative study of both targets is performed in the case of the B 3ϩ ion.

Double‐electron capture processes in charge transfer reactions

“…In practice, the treatment is considerably complicated by the number of channels involved in such processes, as well as the possible interaction with Rydberg states or with the continuum 5. A complete treatment may, however, be performed when double capture channels are directly populated, as shown on the B 4+ + He example 6, 7, or when single and double charge transfer processes are closely correlated as in the N 4+ + He complex collisional system 8, 9.…”