Single-electron-capture cross section for medium- and high-velocity, highly charged ions colliding with atoms

Classical treatment of ion-H2O collisions with a three-center model potential

“…For energies lower than 100 keV/amu, it seems that a linear scaling with respect to Z P is better than the proposed Z 2 P one (see Fig. 13); this agrees with the low-E over-barrier prediction of Knudsen et al [61], which leads to constant σ SC (Z P ,v)/Z P values for any values of Z P and v. In other words, our proposed SC scaling fills the gap between the low-and high-velocity regimes. Finally, the scaling relations that apply to bare projectile impact can be safely used for dressed projectiles at intermediate E when inner electronic structure is not important [38,62].…”

Charge exchange processes involving iron ions

“…It should be noted that the low-energy data of Phaneuf (1983) were not available at the time these scalings were examined. Knudsen et al (1981b) and Salop (1977), and the unltarized-distorted-wave (UDWA) method introduced by Ryufuku and Watanabe (1979). Both methods produce cross sections which are in good agreement with experimental data for partiallystripped ions at energies above roughly 100 keV/smu.…”

On the formation of H(n=3)dipole moments in collisions of protons on rare gas atoms

“…The charge transfer cross section on the other hand, increases for smaller ionization energy, since the release condition is satisfied for a larger range of impact parameters as observed experimentally. The classical Bohr-Lindhard model (BLM) [18] gives surprisingly good results in the case of collisions of fully stripped ions with hydrogen and correctly predicts the cross sections for charge transfer in a very wide range of impact velocities [19]. It is important to note that the BLM accounts only for total cross sections and not for cross sections into subshells or charge distributions.…”