Neutralization and equilibration of highly charged argon ions at grazing incidence on a graphite surface

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.4228· OSTI ID:284338

Winecki, S; Cocke, C L; Fry, D; Stoeckli, M P ^[1]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

Final-charge-state distributions of argon ions, scattered grazingly from a smooth highly oriented pyrolytic graphite surface, have been measured as a function of initial charge state ({ital q}=4{endash}17) and impact velocity ({ital v}=0.15{endash}0.62 a.u.) The final-charge-state distribution changes strongly with the impact velocity, but is almost independent of the initial charge state. The neutralization during grazing-angle scattering is compared to the charge-state equilibration experienced by ions passing through a solid (carbon foil), and these two processes seem to have common properties. A {ital K} x-ray spectrum from the {ital K}-shell vacancy decay of 51-KeV Ar{sup 17+} projectiles was obtained as a function of the angle between the ion beam and the surface. Measurements of x-ray spectra in coincidence with grazingly scattered ions are reported. A simple model for argon neutralization near and below the surface is proposed. The model assumes a direct side feeding into the Ar {ital M} shell followed by Auger and radiative {ital L}- and {ital K}-shell filling. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284338
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON IONS
CARBON
ELECTRON ATTACHMENT
ELECTRON EXCHANGE
GRAPHITE
ION COLLISIONS
KEV RANGE 10-100
SCATTERING
X-RAY SPECTRA