Investigation of the surface sensitivity of positron-annihilation-induced Auger-electron spectroscopy
Thesis/Dissertation
·
OSTI ID:7196632
The first surface sensitivity studies of positron-annihilation-induced Auger-electron spectroscopy (PAES) are presented. Preliminary measurements on polycrystalline Al with adsorbates indicate that PAES is more selective of the surface than conventional electron-induced Auger electron spectroscopy (EAES). PAES and EAES studies of well-defined overlayer-metal systems of Cu(110)+S and Cu(110)+Cs verify that PAES is selective of the top atomic layer. This surface selectivity is accounted for by theoretical calculations which indicate that the positron surface state is displaced away from the substrate by the over-layer, decreasing the annihilation rate of positrons with substrate core electrons.
- Research Organization:
- Texas Univ., Arlington, TX (United States)
- OSTI ID:
- 7196632
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METALS
ALUMINIUM
ANNIHILATION
AUGER ELECTRON SPECTROSCOPY
BASIC INTERACTIONS
CESIUM
COLLISIONS
COPPER
ELECTROMAGNETIC INTERACTIONS
ELECTRON SPECTROSCOPY
ELEMENTS
EQUIPMENT
INTERACTIONS
LAYERS
METALS
PARTICLE INTERACTIONS
POSITRON COLLISIONS
SOLAR EQUIPMENT
SPECTRALLY SELECTIVE SURFACES
SPECTROSCOPY
SUBSTRATES
SURFACES
TRANSITION ELEMENTS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METALS
ALUMINIUM
ANNIHILATION
AUGER ELECTRON SPECTROSCOPY
BASIC INTERACTIONS
CESIUM
COLLISIONS
COPPER
ELECTROMAGNETIC INTERACTIONS
ELECTRON SPECTROSCOPY
ELEMENTS
EQUIPMENT
INTERACTIONS
LAYERS
METALS
PARTICLE INTERACTIONS
POSITRON COLLISIONS
SOLAR EQUIPMENT
SPECTRALLY SELECTIVE SURFACES
SPECTROSCOPY
SUBSTRATES
SURFACES
TRANSITION ELEMENTS