Multiple ionization of neon induced by Li³⁺and C³⁺projectiles: influence of projectile screening in the ionization and electron capture channels

Abstract

Neq + (q = 1,2,3,4) ionization and charge exchange cross sections (total electron capture, single electron capture and transfer ionization) in the collisions with Li3+, with energies between 100 and 900 keV amu−1, and C3+, with energies between 250 and 500 keV amu−1 are reported. Bare Li3+ projectiles give a key benchmark to study the role of projectile screening in collisions involving dressed projectile ions, and the measurements have shown a strong screening effect for all n-fold recoil ion charge states in the ionization channel which, unexpectedly, does not appear for transfer ionization.

Multiple ionization of Ne induced by 10 keV/u–500 keV/u C q + ( q = 1–3) ions

“…Figures 2-4 show our measured values of cross section ratio R k1 for C q+ -Ne (q = 1-3), the estimates from the present theory, and previous other groups' results. [29,30] this work Kirchner et al [29] Ihani et al [30] this work Kirchner et al [29] Ihani et al [30] this work Kirchner et al [29] Ihani et al [30] R31 R41 R21 It is clear that our experimental data and other groups' results are quantitatively accordant with the present results for R 21 and R 31 obtained from the ME-COBI model, and for R 41 , they are qualitatively consistent with the result from the present model. The experiment and the theory model both indicate that the cross section ratios for C q+ -Ne collision are strongly dependent on projectile energy.…”

Water fragmentation by bare and dressed light ions with MeV energies: Fragment-ion-energy and time-of-flight distributions

“…The main difference lies in the high-energy edge distribution, where the three projectile energies have different slopes in the general monotonic decrease trend (above 30 eV). Higher production of energetic H + ions occurs for lower projectile energies, where the double electron removal channels, in particular the electron capture with multiple ionization (transfer ionization), start to compete with the pure single-ionization channel [50,51].…”

Absolute cross sections for electron loss, electron capture, and multiple ionization in collisions of Li2+with argon

“…It was observed that the experimental results are independent of the hitting position of the product ions on the detector. The detection efficiency of the recoil-ion detector was observed to be independent of either the charge state or the energy of the particle hitting the detector, so that the ratio of counting rates is a measure of the intensity ratio of the ions [51,52].…”