Two-state atomic expansion methods for electron capture from multielectron atoms by fast protons

Charge transfer in collisions of O+ with H and H+ with O

“…The current CTMC and CDW calculations (which include the sum of capture from the O(1s), O(2s), and O(2p) subshells computed using the independent electron model) are compared with the experiments of Stier & Barnett (1956), de Heer et al (1966, Schryber (1967), Toburen et al (1968), Williams et al (1984), and Thompson et al (1996), and the calculations of Tan & Lee (1981), and the atomic-orbital close-coupling (AOCC) results of Hamre et al (1999). Additionally, the K-shell capture (i.e., removal of an O(1s) electron) measurements of Cocke et al (1977) are compared to the theoretical calculations of Lin et al (1978), Miraglia et al (1984), and Saha et al (1985). Other K-shell capture calculations (not shown for clarity) were performed by Ghosh et al (1987), Belkić (1988), Dunseath et al (1988), Gravielle & Miraglia (1988), and Kuang (1991).…”

“…3 Schryber (1967) [stars], Toburen et al (1968) [open left triangles], Cocke et al (1977) [open squares], Williams et al (1984) [filled diamonds], Thompson et al (1996) [open circles]. Previous theory: Hamre et al (1999) [thin solid line], Lin et al (1978) [thin long dashed line], Tan & Lee (1981) [thin dot-dash line], Miraglia (1984) [thin dot-dash line], Saha et al (1985) [thin solid line] of the fine-structure cross sections agree between 0.1 and 0.5 eV/u, but again diverge for lower energies. While the differences in the magnitudes of the cross sections may be related to differences in the radial coupling matrix element (not explicitly given by Chambaud et al), we cannot explain the lower energy discrepancies.…”

Single and doubleK-shell ionization and electron-transfer cross sections for Fe and Ni bombarded by S ions and Fe by Si ions at 1.25–4.70 MeV/amu

“…Its dominance over the direct K-shell ionization has been investigated in detail [1] for asyminetric and nearly symmetric collision systems using Ti as the target and various heavy ion beams up to Cl as the projectiles in the lowand intermediate-energy ranges. The two-state atomicexpansion (TSAE) model, developed by Lin and coworkers [2,3] based on the formulation given by Bates [4], is found to be very successful to explain these data on the K-K transfer cross section for nearly symmetric collision systems. However, the same model was found to overestimate the measured data for asymmetric systems (see for example the data on F~Ti and F -+Si in Refs.…”

L-shell vacancy production in Ag, Ta and Au for incident ionsZ 1?10 in the energy range of 0.125?4 MeV/amu

“…A simple estimate of the adiabatic effects was received with the Nikitin model. An improved description of the charge exchange process at intermediate velocities should be reached, in our opinion, using the model of Lin et al [42,43] which, moreover, takes into account dynamic couplings caused by translation effects. For the total process -projectile Kshell vacancy production followed by KL vacancy transfer within the same collision -a closed description does not exist.…”