Differential electron emission in multi-charged ion atom collisions: Systematics for distant and close collisions
- Pacific Northwest Lab., Richland, WA (United States)
- Institute fuer Kernphysik der J.W. Goethe Universitat Frankfurt (Germany)
Absolute doubly differential cross sections for electron emission are presented for 0.5 MeV/u multi-charged ion impact on helium, neon, and argon targets. For the helium target, Bq+, Cq+ (q = 2--5) and Oq+, Fq+ (q = 3--6) projectiles were studied; for neon and argon, only Cq+ (q = 2--5) projectiles were used. Electron emission for 10{degrees} {le} {Theta} {le} 60{degrees} was studied. The measured cross sections were assumed to scale as the square of an effective projectile charge, Z{sub eff}, which was determined as a function of emitted electron energy and angle. For distant collisions (low emitted electron energies), we find that Z{sub eff} {approx} q for small q and Z{sub eff} < q for the highest values of q investigated. For sufficiently close collisions (above the binary encounter peak), Z{sub eff} > Z and increases as q decreases. This is true for all angles and targets investigated.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10109585
- Report Number(s):
- PNL-SA--21302; CONF-920948--11; ON: DE93004324
- Country of Publication:
- United States
- Language:
- English
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