Charge exchange in low-energy proton-surface scattering studied by discrete variational [ital X][alpha] cluster calculations
- National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305 (Japan)
Neutralization and electronic excitation during low-energy proton-surface scattering have been investigated from a combination of experiments and discrete variational [ital X][alpha] calculations of the adiabatic molecular-orbital-energy diagram. The charge exchange in D[sup +] scattering seems to have a more local character than expected from the conventional band picture of resonance neutralization, especially for the ionic-compound surfaces or surfaces with positively or negatively charged adatoms. Some of these local features are shown to arise from the formation of the surface molecule or the promotion of the H 1[ital s] orbital during the violent collision, which results in electronic excitation, such as reionization or electron-hole pair formation, and suppression of ion neutralization to some extent. The experimentally observed target-element dependencies of these processes are elucidated qualitatively in line with this scheme.
- OSTI ID:
- 6784505
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 50:24; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CESIUM FLUORIDES
CHARGE EXCHANGE
SURFACE IONIZATION
DEUTERIUM IONS
SCATTERING
HYDROGEN IONS
MAGNESIUM OXIDES
SODIUM CHLORIDES
EPITAXY
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CESIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONIZATION
IONS
MAGNESIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
663620* - Physics of Radiations Other Than Neutrons- (1992-)