Resonant neutralization of {sup 7}Li{sup +} scattered from Cs/Al(100) as a probe of the local electrostatic potential
- Department of Physics, University of California, Riverside, California 92521 (United States)
Time-of-flight detection is used to measure the resonant neutralization probabilities for 1.2 and 2.0 keV {sup 7}Li{sup +} ions singly scattered from Cs and Al atomic sites of the Cs/Al(100) surface. For the lowest Cs coverages, neutral fractions for scattering from Cs are {similar_to}0.70 and {similar_to}0.78, while the neutral fractions for scattering from Al are {similar_to}0.43 and {similar_to}0.55, respectively. The disparity in neutral fractions between scattering from Cs and Al demonstrates that the surface local electrostatic potential is significantly inhomogeneous. At higher Cs coverages [{gt}0.05 monolayer (ML)], however, the neutral fractions for scattering from Al and Cs sites become nearly equal, which indicates that the variations in the surface potential are greatly reduced. For Cs coverages above 0.075 ML, the formation of Li{sup {minus}} negative ions via resonant tunneling is observed for scattering from Cs. {copyright} {ital 1995} {ital American} {ital Vacuum} {ital Society}
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 64956
- Journal Information:
- Journal of Vacuum Science and Technology, A, Vol. 13, Issue 3; Other Information: PBD: May 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Site-specific neutralization of low energy [sup 7]Li[sup +] scattered from Na/Al(100)
Trajectory-dependent resonant neutralization of low energy [sup 7]Li[sup +] scattered from clean and Na-covered Al(100)