Investigation of the surface sensitivity of positron-annihilation-induced Auger-electron spectroscopy

Miscellaneous · Mon Jan 01 00:00:00 EST 1990

OSTI ID:7196632

Mehl, D R

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
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
AUGER ELECTRON SPECTROSCOPY
SPECTRALLY SELECTIVE SURFACES
ANNIHILATION
CESIUM
COPPER
LAYERS
POSITRON COLLISIONS
SUBSTRATES
ALKALI METALS
BASIC INTERACTIONS
COLLISIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON SPECTROSCOPY
ELEMENTS
EQUIPMENT
INTERACTIONS
METALS
PARTICLE INTERACTIONS
SOLAR EQUIPMENT
SPECTROSCOPY
SURFACES
TRANSITION ELEMENTS
665300* - Interactions Between Beams & Condensed Matter- (1992-)