Positron states on the Cs/Cu(100) surface

Conference · Fri Feb 01 04:00:00 EST 1991 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5023067

Koeymen, A R; Lee, K H; Mehl, D; Weiss, A ^[1]; Jensen, K O ^[2]

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1. Physics Department, University of Texas at Arlington, Texas (USA)
2. School of Mathematics and Physics, University of East Anglia, Norwich NR4 7TJ (United Kingdom)

The attenuation of the CuM{sub 23}VV Auger peak with Cs coverage on Cu(100) is measured using both positron-annihilation-induced Auger electron emission (PAES) and conventional (electron induced) Auger electron spectroscopy (EAES). The Cs coverage varies from 0 to 1 physical monolayer (ML). The data indicates that below 0.5 ML in agreement with first order theoretical calculations the positrons are trapped at the Cu/Cs interface. At higher Cs coverages the thermal desorption of the positrons as positronium drops the PAES intensity to zero whereas the EAES signal changes linearly as expected.

• OSTI ID: 5023067
• Report Number(s): CONF-900798--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 218:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METALS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
AUGER ELECTRON SPECTROSCOPY
BASIC INTERACTIONS
CESIUM
COLLISIONS
DESORPTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON SPECTROSCOPY
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
LAYERS
LEPTONS
MATTER
METALS
PARTICLE INTERACTIONS
POSITRON COLLISIONS
POSITRONIUM
POSITRONS
SPECTROSCOPY