Nonperturbative treatment of the screened-Coulomb contribution of projectile-electron loss
- Instituto de Fisica da Universidade Federal do Rio Grande do Sul, Avenida Bento Goncalves 9500, 91501-970, Porto Alegre (Brazil)
The electron-loss cross section of He{sup +} ions impinging upon noble-gas targets (2{le}{ital Z}{sub 2}{le}36) is calculated by using the coupled-channel method for the active projectile electron in the static screened field of the target atom. The calculations show a saturation of the projectile-electron-loss cross section with increasing target atomic number. This saturation effect due to neutral target systems is much more pronounced than for ionization or excitation by charged particles. Comparison with experimental data indicates a small electron-loss contribution from electron-electron interaction processes for heavy targets at intermediate velocities. Remaining discrepancies in the data are discussed in the light of the approximations involved in our theoretical treatment. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 385681
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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