Target ionization and projectile charge changing in 0.5{endash}8-MeV/q Li{sup q+}+He (q=1,2,3) collisions
- Department of Physics, Western Michigan University, Kalamazoo, Michigan49008 (United States)
Target ionization and projectile charge changing were investigated for 0.5{endash}8-MeV/q Li{sup q+}+He (q=1,2,3) collisions. Cross sections for the single and double ionization of He associated with no projectile charge change (direct ionization), single-electron capture, and single-electron loss were measured using coincidence techniques and compared to existing experimental and theoretical results. Total cross sections for single-electron capture (for Li{sup 1,2,3+}) and single-electron loss (for Li{sup 1,2+}) were also obtained. For a given incoming projectile charge state the double-to-single target ionization ratios R vary strongly with the outgoing reaction channel. For direct ionization, R is nearly independent of the incident projectile charge state and can be described by the semi-empirical scaling rule of Knudsen {ital et al.} [J. Phys. B {bold 17}, 3545 (1984)]. However, for ionization associated with single-electron loss and single-electron capture by the projectile, R depends quite strongly on the incident charge state of the projectile. These ionization ratios R are interpreted in terms of theoretical formulations involving electron-nucleus interactions and electron-electron interactions. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 625863
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 57; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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