Trajectory-dependent resonant neutralization of low energy [sup 7]Li[sup +] scattered from clean and Na-covered Al(100)

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States)

DOI:https://doi.org/10.1116/1.578358· OSTI ID:6274447

German, K A.H.; Weare, C B; Varekamp, P R; Yarmoff, J A ^[1]; Andersen, J N ^[2]

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1. Department of Physics, University of California, Riverside, California 92521 (United States) Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
2. Department of Synchrotron Radiation Research, Institute of Physics, Lund University, Soelvegatan 14, S-223 62 Lund (Sweden)

Trajectory-dependent neutralization is observed for low energy (1--5 keV) [sup 7]Li[sup +] ions scattered at large angles from Na-covered Al(100). Energy spectra and angular scans of the scattered Li[sup +] ion yield are collected as a function of Na coverage. Li[sup +] ions are partially neutralized upon single scattering from Al sites and completely neutralized when scattered from Na. This site-specific neutralization indicates that the surface electrostatic potential is nonuniform. The neutralization probability is also shown to be a function of the exit angle from the surface. The results are analyzed using theoretical ion fractions based on a semiclassical resonant charge exchange model.

• OSTI ID: 6274447
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States), Vol. 11:4; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ION COLLISIONS
LITHIUM IONS
COLLISIONS
SODIUM
ANGULAR DISTRIBUTION
BEAM NEUTRALIZATION
ENERGY SPECTRA
KEV RANGE 01-10
ALKALI METALS
CHARGED PARTICLES
DISTRIBUTION
ELEMENTS
ENERGY RANGE
IONS
KEV RANGE
METALS
SPECTRA
665300* - Interactions Between Beams & Condensed Matter- (1992-)