Resonantlike desorption of negative ions by core-level excitation under electron bombardment

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.R4257· OSTI ID:279070

Petravic, M; Williams, J S ^[1]; Hoffman, A ^[2]

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1. Department of Electronic Materials Engineering, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia)
2. Chemistry Department and The Solid State Institute, Technion, Haifa 32000 (Israel)

Electron-stimulated desorption of positive and negative hydrogen ions from hydrogenated GaAs surfaces has been studied as a function of impact electron energy. Well-defined peaks in the negative ion yield are observed at incident electron energies close to Ga and As core-level binding energies, suggesting that resonantlike core-level electronic transitions involving matrix atoms are most likely responsible for such behavior. We propose that the formation and subsequent breakup of superexcited molecular complexes containing a core hole can lead directly to the ejection of negative ions. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 279070
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 8 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DESORPTION
ELECTRON COLLISIONS
ENERGY DEPENDENCE
EV RANGE
GALLIUM ARSENIDES
HYDROGEN IONS
MASS SPECTRA
RESONANCE SCATTERING
SORPTIVE PROPERTIES
YIELDS